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Cover Page - shares	3 Months Ended
Cover Page - shares	Jun. 30, 2020	Aug. 06, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2020
Document Transition Report	false
Entity File Number	001-37929
Entity Registrant Name	Myovant Sciences Ltd.
Entity Incorporation, State or Country Code	D0
Entity Tax Identification Number	98-1343578
Entity Address, Address Line Two	Suite 1, 3rd Floor
Entity Address, Address Line One	11-12 St. James’s Square
Entity Address, City or Town	London
Entity Address, Postal Zip Code	SW1Y 4LB
Entity Address, Country	GB
Country Region	44
City Area Code	207
Local Phone Number	400 3351
Title of 12(b) Security	Common Shares, $0.000017727 par value per share
Trading Symbol	MYOV
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		90,149,320
Entity Central Index Key	0001679082
Amendment Flag	false
Current Fiscal Year End Date	--03-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020
Current assets:
Cash and cash equivalents	$ 84,726	$ 76,644
Marketable securities	14,970	2,997
Prepaid expenses and other current assets	9,370	8,269
Total current assets	109,066	87,910
Property and equipment, net	2,453	2,497
Operating lease right-of-use asset	10,790	11,146
Other assets	4,373	4,373
Total assets	126,682	105,926
Current liabilities:
Accounts payable	5,388	15,334
Interest payable (related party)	24	15
Accrued expenses	28,920	29,060
Deferred revenue	16,667	40,000
Operating lease liability	1,585	1,516
Total current liabilities	52,584	85,925
Long-term operating lease liability	10,571	10,996
Long-term debt, less current maturities (related party)	193,700	113,700
Other	4,437	3,582
Total liabilities	261,292	214,203
Commitments and contingencies (Note 11)
Shareholders’ deficit:
Common shares, par value $0.000017727 per share, 564,111,242 shares authorized, 90,137,012 and 89,833,998 issued and outstanding at June 30, 2020 and March 31, 2020, respectively	2	2
Additional paid-in capital	694,383	684,381
Accumulated other comprehensive loss	(5,121)	(1,646)
Accumulated deficit	(823,874)	(791,014)
Total shareholders’ deficit	(134,610)	(108,277)
Total liabilities and shareholders’ deficit	$ 126,682	$ 105,926

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2020	Mar. 31, 2020
Statement of Financial Position [Abstract]
Common shares par value (in USD per share)	$ 0.000017727	$ 0.000017727
Common shares authorized (in shares)	564,111,242	564,111,242
Common shares issued (in shares)	90,137,012	89,833,998
Common shares outstanding (in shares)	90,137,012	89,833,998

Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
License and milestone revenue	$ 33,333	$ 0
Operating expenses:
Research and development	44,186	51,117
General and administrative	22,828	14,152
Total operating expenses	67,014	65,269
Loss from operations	(33,681)	(65,269)
Interest expense	0	3,793
Interest expense (related party)	2,184	0
Interest income	(108)	(766)
Other income, net	(3,569)	(705)
Loss before income taxes	(32,188)	(67,591)
Income tax expense	672	313
Net loss	$ (32,860)	$ (67,904)
Net loss per common share — basic and diluted (in USD per share)	$ (0.37)	$ (0.89)
Weighted average common shares outstanding — basic and diluted (in shares)	89,300,210	76,468,347
Revenue, Product and Service [Extensible List]	us-gaap:LicenseAndServiceMember	us-gaap:LicenseAndServiceMember

Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (32,860)	$ (67,904)
Other comprehensive loss:
Foreign currency translation adjustment	(3,475)	(819)
Total other comprehensive loss	(3,475)	(819)
Comprehensive loss	$ (36,335)	$ (68,723)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details

Condensed Consolidated Statement of Shareholders' (Deficit) Equity - USD ($) $ in Thousands	Total	Common Shares	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Public Offering	Public Offering Common Shares	Public Offering Additional Paid-in Capital	Cowen and Company, LLC Private Placement	Cowen and Company, LLC Private Placement Common Shares	Cowen and Company, LLC Private Placement Additional Paid-in Capital
Beginning balance (in shares) at Mar. 31, 2019		72,057,490
Beginning balance at Mar. 31, 2019	$ 4,334	$ 1	$ 505,851	$ 507	$ (502,025)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares (in shares)							17,424,243			106,494
Issuance of shares						$ 134,538	$ 1	$ 134,537	$ 2,546		$ 2,546
Share-based compensation expense	6,410		6,410
Capital contribution from former controlling shareholder — share-based compensation	42		42
Capital contribution from former controlling shareholder	106		106
Foreign currency translation adjustment	(819)			(819)
Issuance of shares upon exercise of stock options and vesting of restricted stock units (in shares)		34,399
Issuance of shares upon exercise of stock options and vesting of restricted stock units	314		314
Net loss	(67,904)				(67,904)
Ending balance (in shares) at Jun. 30, 2019		89,622,626
Ending balance at Jun. 30, 2019	$ 79,567	$ 2	649,806	(312)	(569,929)
Beginning balance (in shares) at Mar. 31, 2020	89,833,998	89,833,998
Beginning balance at Mar. 31, 2020	$ (108,277)	$ 2	684,381	(1,646)	(791,014)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	7,812		7,812
Foreign currency translation adjustment	(3,475)			(3,475)
Issuance of shares upon exercise of stock options and vesting of restricted stock units (in shares)		303,014
Issuance of shares upon exercise of stock options and vesting of restricted stock units	2,190		2,190
Net loss	$ (32,860)				(32,860)
Ending balance (in shares) at Jun. 30, 2020	90,137,012	90,137,012
Ending balance at Jun. 30, 2020	$ (134,610)	$ 2	$ 694,383	$ (5,121)	$ (823,874)

Condensed Consolidated Statement of Shareholder's Equity (Parenthetical) $ in Thousands	3 Months Ended
	Jun. 30, 2019 USD ($)
Public Offering
Issuance costs	$ 9,229
Cowen and Company, LLC \| Private Placement
Issuance costs	$ 79

Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands

3 Months Ended

Jun. 30, 2020

Jun. 30, 2019

Cash flows from operating activities:

Net loss

$ (32,860)

$ (67,904)

Adjustments to reconcile net loss to net cash used in operating activities:

Share-based compensation

7,812

6,452

Depreciation and amortization

^[1]

551

356

Amortization of debt discount and issuance costs

555

Foreign currency transaction gain

(3,569)

(705)

Other

(8)

Changes in operating assets and liabilities:

Prepaid expenses and other current assets

(1,101)

1,501

Income tax receivable

193

Other assets

237

Accounts payable

(9,946)

(1,015)

Interest payable

(319)

Interest payable (related party)

Accrued expenses

(140)

(7,493)

Deferred revenue

Operating lease liabilities

(356)

(178)

Deferred interest payable

1,517

Other

855

Net cash used in operating activities

(61,984)

(66,811)

Cash flows from investing activities:

Purchases of marketable securities

(14,973)

Maturities of marketable securities

3,000

Purchases of property and equipment

(151)

(139)

Net cash used in investing activities

(12,124)

(139)

Cash flows from financing activities:

Proceeds from related party debt financing

80,000

Proceeds from stock option exercises

2,190

314

Net cash provided by financing activities

82,190

137,610

Net change in cash, cash equivalents and restricted cash

8,082

70,660

Cash, cash equivalents and restricted cash, beginning of period

78,018

157,199

Cash, cash equivalents and restricted cash, end of period

86,100

227,859

Non-cash financing activities:

Deferred financing costs included in accrued expenses

212

Private Placement | Cowen and Company, LLC

Cash flows from financing activities:

Cash proceeds from issuance of common shares

2,546

Public Offering

Cash flows from financing activities:

Cash proceeds from issuance of common shares

$ 0

$ 134,750

[1]	Includes amortization of operating lease right-of-use asset.

Description of Business	3 Months Ended
Description of Business	Jun. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	Description of Business Myovant Sciences Ltd. (together with its wholly-owned subsidiaries, the “Company”) is a healthcare company that aspires to redefine care for women and for men through purpose-driven science, empowering medicines, and transformative advocacy. The Company’s lead product candidate is relugolix, a once-daily, oral gonadotropin-releasing hormone (“GnRH”) receptor antagonist for which the Company has successfully completed multiple Phase 3 clinical studies across three distinct indications. The Company is preparing for potential commercial launches in the United States (“U.S.”) of relugolix combination tablet (relugolix 40 mg, estradiol 1.0 mg and norethindrone acetate 0.5 mg) for the treatment of women with heavy menstrual bleeding associated with uterine fibroids or pain associated with endometriosis, and relugolix monotherapy tablet (120 mg) for the treatment of men with advanced prostate cancer, in anticipation of U.S. Food and Drug Administration (“FDA”) approval to market in these indications. The Company submitted its New Drug Application (“NDA”) to the FDA for relugolix monotherapy tablet for the treatment of men with advanced prostate cancer in April 2020. This application was accepted for priority review and has a target action date of December 20, 2020. The Company submitted an NDA for relugolix combination tablet for the treatment of women with heavy menstrual bleeding associated with uterine fibroids in May 2020. The Company has also announced positive results from two replicate Phase 3 clinical studies evaluating relugolix combination therapy in women with pain associated with endometriosis. The Company is developing MVT-602, an oligopeptide kisspeptin-1 receptor agonist, for the treatment of female infertility as part of assisted reproduction. Takeda Pharmaceuticals International AG (“Takeda”), a subsidiary of Takeda Pharmaceutical Company Limited, the originator of relugolix, granted the Company a worldwide license to develop and commercialize relugolix (excluding Japan and certain other Asian countries) and an exclusive right to develop and commercialize MVT-602 in all countries worldwide. On March 30, 2020, the Company entered into an exclusive license agreement with Gedeon Richter Plc. (“Richter”) for Richter to commercialize relugolix combination tablet for uterine fibroids and endometriosis in certain territories outside of the U.S. Under this agreement, the Company has retained all of its rights to relugolix combination tablet in the U.S. and Canada, as well as rights to relugolix in other therapeutic areas outside of women’s health. In March 2020, the Company submitted a Marketing Authorisation Application (“MAA”) to the European Medicines Agency ("EMA") for relugolix combination tablet in uterine fibroids. The MAA submission has completed validation and is now under evaluation by the EMA. The Company is an exempted company limited by shares incorporated under the laws of Bermuda in February 2016 under the name Roivant Endocrinology Ltd. The Company changed its name to Myovant Sciences Ltd. in May 2016. Since its inception, the Company has devoted substantially all of its efforts to identifying and in-licensing its product candidates, organizing and staffing the Company, raising capital, preparing for and advancing the clinical development of its product candidates, and preparing for potential future regulatory approvals and commercialization of relugolix combination tablet and relugolix monotherapy tablet. The Company’s majority shareholder is Sumitovant Biopharma Ltd. (“Sumitovant”), a subsidiary of Sumitomo Dainippon Pharma Co., Ltd. (“Sumitomo Dainippon Pharma”). As of June 30, 2020, Sumitovant directly, and Sumitomo Dainippon Pharma indirectly, own 48,641,181, or 54.0%, of the Company’s outstanding common shares. The Company has incurred, and expects to continue to incur, significant operating losses and negative operating cash flows as it continues to develop its product candidates and prepares for potential future regulatory approvals and commercialization of relugolix combination tablet and relugolix monotherapy tablet. To date, the Company has not generated any product revenue, and it does not expect to generate product revenue unless and until it obtains regulatory approval for at least one of its product candidates. The Company has funded its operations primarily from the issuance and sale of its common shares and from debt financing arrangements

Summary of Significant Accounting Policies

3 Months Ended

Jun. 30, 2020

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

(A) Basis of Presentation

The Company’s fiscal year ends on March 31, and its first three fiscal quarters end on June 30, September 30 and December 31. The Company has determined that it has one operating and reporting segment as it allocates resources and assesses financial performance on a consolidated basis.

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and disclosures required by U.S. GAAP for complete financial statements. These unaudited condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended March 31, 2020, filed with the U.S. Securities and Exchange Commission (the “SEC”) on May 18, 2020. The unaudited consolidated balance sheet at March 31, 2020 has been derived from the audited

consolidated financial statements at that date. In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary to present fairly the financial position of the Company and its results of operations and cash flows for the interim periods presented have been included. Operating results for the three months ended June 30, 2020 are not necessarily indicative of the results that may be expected for the fiscal year ending March 31, 2021, for any other interim period or for any other future year. There have been no significant changes in the Company’s accounting policies from those disclosed in its Annual Report on Form 10-K for the fiscal year ended March 31, 2020, filed with the SEC on May 18, 2020.

Any reference in these notes to applicable accounting guidance is meant to refer to the authoritative U.S. GAAP included in the Accounting Standards Codification (“ASC”) and Accounting Standards Update (“ASU”), issued by the Financial Accounting Standards Board (“FASB”). The unaudited condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. The Company has no unconsolidated subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.

The Company has evaluated whether there are conditions and events, considered in the aggregate, that raise substantial doubt about the Company’s ability to continue as a going concern within one year after the date the unaudited condensed consolidated financial statements are issued. During the three months ended June 30, 2020, the Company incurred net losses of $32.9 million and used $62.0 million of cash and cash equivalents in operations. The Company expects to continue to incur significant and increasing operating losses and negative operating cash flows as it continues to develop its product candidates and prepares for potential future regulatory approvals and commercialization of relugolix combination tablet and relugolix monotherapy tablet. In addition, the Company expects that its outstanding debt levels will increase in future periods, which will result in an increase in its quarterly interest payment obligations. The Company has not generated any product revenue to date and does not expect to generate product revenue unless and until it obtains regulatory approval for at least one of its product candidates. Based on its current operating plan, the Company expects that its existing cash, cash equivalents, marketable securities, and its ability to borrow under the terms of the Sumitomo Dainippon Pharma Loan Agreement (See Note 5(A)) will be sufficient to fund its operating expenses and capital expenditure requirements at least through the end of the Company’s fiscal year ending March 31, 2021. This estimate is based on the Company’s current assumptions, including assumptions relating to its ability to manage its spend, that might prove to be wrong, and it could use its available capital resources sooner than it currently expects. Current cash, cash equivalents, marketable securities and amounts available under the Sumitomo Dainippon Pharma Loan Agreement will not be sufficient to enable the Company to complete all necessary development and regulatory activities and commercially launch relugolix combination tablet or relugolix monotherapy tablet. The Company anticipates that it will continue to incur net losses and negative operating cash flows for the foreseeable future.

To continue as a going concern, the Company will need, among other things, additional capital resources. The Company continually assesses multiple options to obtain additional funding to support its operations, including through financing activities in public or private capital markets. Management can provide no assurances that any sources of a sufficient amount of financing will be available to the Company on favorable terms, if at all. Although the Company expects to draw under the Sumitomo Dainippon Pharma Loan Agreement on a quarterly basis, such draws are contingent upon the consent of the Company’s board of directors. In addition, if Sumitomo Dainippon Pharma fails to own at least a majority of the Company’s outstanding common shares, it may become unlawful under Japanese law for Sumitomo Dainippon Pharma to fund loans to the Company, in which case the Company would not be able to continue to borrow under the Sumitomo Dainippon Pharma Loan Agreement. ASC 240-40, Going Concern, does not allow the Company to consider future financing activities that are uncertain in its assessment of the Company’s future cash burn for the purpose of its liquidity assessment. On August 5, 2020, the Company obtained an additional $200.0 million low-interest, five-year term loan commitment from Sumitomo Dainippon Pharma (see Note 12).

Due to these uncertainties, there is substantial doubt about the Company’s ability to continue as a going concern. The unaudited condensed consolidated financial statements and footnotes have been prepared on the basis that the Company will continue as a going concern, and do not include any adjustments to reflect the possible future effects on the recoverability and classification of assets or the amounts and classification of liabilities that may result from the possible inability of the Company to continue as a going concern.

(B) Use of Estimates

The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions in certain circumstances that affect the amounts reported in the consolidated financial statements and accompanying notes. The Company regularly evaluates estimates and assumptions related to assets and liabilities, and disclosures of contingent assets and liabilities at the dates of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting periods. Determinations in which management uses subjective judgments include, but are not limited to, the evaluation of the Company’s ability to continue as a going concern, revenue recognition, share-based compensation expenses, research and development (“R&D”) expenses and accruals, leases, and income taxes. The Company

bases its estimates and assumptions on historical experience and on various other factors that it believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period, that are not readily apparent from other sources. Estimates and assumptions are periodically reviewed in light of changes in circumstances, facts, or experience. Changes in estimates and assumptions are reflected in reported results in the period in which they become known. Actual results could differ from those estimates.

Basic net loss per common share is computed by dividing net loss applicable to common shareholders by the weighted-average number of common shares outstanding during the period, reduced, when applicable, for outstanding yet unvested shares of restricted common stock. The computation of diluted net loss per common share is based on the weighted-average number of common shares outstanding during the period plus, when their effect is dilutive, incremental shares consisting of shares subject to stock options, restricted stock units, restricted stock awards, performance stock units, and warrants. In periods in which the Company reports a net loss, all common share equivalents are deemed anti-dilutive such that basic net loss per common share and diluted net loss per common share are equal. Potentially dilutive common shares have been excluded from the diluted net loss per common share computations in all periods presented because such securities have an anti-dilutive effect on net loss per common share due to the Company’s net loss. There are no reconciling items used to calculate the weighted-average number of total common shares outstanding for basic and diluted net loss per common share.

As of June 30, 2020 and 2019, potentially dilutive securities were as follows:


	June 30,
	2020	2019
Stock options	8,648,078	7,085,337
Restricted stock awards (unvested)	564,111	846,165
Restricted stock units (unvested)	2,771,770	38,449
Performance stock units (unvested)	831,431	—
Warrants	73,710	73,710
Total	12,889,100	8,043,661

(D) Cash, Cash Equivalents, and Restricted Cash

Cash and cash equivalents include cash deposits in banks and all highly liquid investments that are readily convertible to cash. The Company considers all highly liquid investments with a maturity of three months or less at the time of purchase to be cash equivalents.

Restricted cash consists of legally restricted deposits held as compensating balances against the Company’s corporate credit card program and irrevocable standby letters of credit provided as security for the Company’s office lease and sublease.

Cash as reported on the unaudited condensed consolidated statements of cash flows includes the aggregate amounts of cash, cash equivalents, and restricted cash and consists of the following (in thousands):


	June 30,
	2020		2019
Cash and cash equivalents	$	84,726	$	226,734
Restricted cash ⁽¹⁾	1,374		1,125
Total cash, cash equivalents and restricted cash	$	86,100	$	227,859

⁽¹⁾ Included in other assets on the unaudited condensed consolidated balance sheets.

(E) Marketable Securities

Investments in marketable securities are held in a custodial account at a financial institution and managed by the Company’s investment advisor based on the Company’s investment guidelines. The Company considers all highly liquid investments in securities with a maturity of greater than three months at the time of purchase to be marketable securities.

The Company classifies its marketable securities as available-for-sale at the time of purchase and reevaluates such designation at each balance sheet date. Unrealized gains and losses on available-for-sale securities are excluded from earnings and are recorded in accumulated other comprehensive (loss) income until realized. Any unrealized losses are evaluated for other-than-temporary impairment at each balance sheet date. Realized gains and losses are determined based on the specific identification method and are recorded in other income, net.

The Company does not intend to sell its securities that are in an unrealized loss position, and it is unlikely that the Company will be required to sell its securities before recovery of their amortized cost basis, which may be maturity. Factors considered in determining whether a loss is temporary include the length of time and extent to which the fair value has been less than the amortized cost basis and whether the Company intends to sell the security or whether it is more likely than not that the Company would be required to sell the security before recovery of the amortized cost basis. See Note 3 for additional information.

(F) Fair Value Measurements

The Company utilizes fair value measurement guidance prescribed by accounting standards to value its financial instruments. The guidance establishes a fair value hierarchy for financial instruments measured at fair value that distinguishes between assumptions based on market data (observable inputs) and the Company’s own assumptions (unobservable inputs). Observable inputs are inputs that market participants would use in pricing the asset or liability based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company’s assumptions about the inputs that market participants would use in pricing the asset or liability and are developed based on the best information available in the circumstances.

Fair value is defined as the exchange price, or exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the reporting date. As a basis for considering market participant assumptions in fair value measurements, the guidance establishes a three-tier fair value hierarchy that distinguishes among the following:

•Level 1—Valuations are based on unadjusted quoted prices in active markets for identical assets or liabilities that the Company has the ability to access.

•Level 2—Valuations are based on quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active and models for which all significant inputs are observable, either directly or indirectly.

•Level 3—Valuations are based on inputs that are unobservable (supported by little or no market activity) and significant to the overall fair value measurement.

To the extent the valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. Accordingly, the degree of judgment exercised by the Company in determining fair value is greatest for instruments categorized in Level 3. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement.

The Company’s financial instruments include cash, cash equivalents, marketable securities, accounts payable and debt obligations. Cash, cash equivalents, and accounts payable are stated at their respective historical carrying amounts, which approximate fair value due to their short-term nature. Marketable securities are recorded at their estimated fair value and are included in Level 2 of the fair value hierarchy.

(G) Revenue Recognition

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), as subsequently amended, which outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers. The core principle of the revenue model is that an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. The Company was required to adopt ASC 606 on April 1, 2018. As the Company did not have any effective contracts within the scope of this guidance prior to April 1, 2018, ASC 606 had no impact on the Company's consolidated financial statements and related disclosures upon adoption.

In accordance with ASC 606, the Company recognizes revenue when its customer obtains control of promised goods or services, in an amount that reflects the consideration which the Company expects to receive in exchange for those goods or services. To determine revenue recognition for arrangements that the Company determines are within the scope of ASC 606, the Company performs the following five steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when or as the Company satisfies a performance obligation.

When applying the revenue recognition criteria of ASC 606 to license and collaboration agreements, the Company applies significant judgment when evaluating whether contractual obligations represent distinct performance obligations, allocating transaction price to performance obligations within a contract, determining when performance obligations have been met, assessing the recognition and future reversal of variable consideration, and determining and applying appropriate methods of measuring progress for performance obligations satisfied over time. These judgments are discussed in more detail below.

•Licenses of intellectual property: If the licenses to intellectual property are determined to be distinct from the other performance obligations identified in the arrangement, the Company recognizes revenues from non-refundable, upfront fees allocated to the license when the license is transferred to the licensee and the licensee is able to use and benefit from the license. For licenses that are not distinct from other promises, the Company applies judgment to assess the nature of the combined performance obligation to determine whether the combined performance obligation is satisfied over time or at a point in time and, if over time, the appropriate method of measuring progress for purposes of recognizing revenue from non-refundable, upfront fees. The Company evaluates the measure of progress each reporting period and, if necessary, adjusts the related revenue recognition accordingly.

•Milestone payments: At the inception of each arrangement that includes research, development or regulatory milestone payments, the Company evaluates whether the milestones are considered probable of being reached and estimates the amount to be included in the transaction price using the most likely amount method. If it is probable that a significant revenue reversal would not occur, the associated milestone value is included in the transaction price. Milestone payments that are not within the Company’s control or the licensee, such as regulatory approvals, are not considered probable of being achieved until those approvals are received. The transaction price is then allocated to each performance obligation on a relative standalone selling price basis, for which the Company recognizes revenue as or when the performance obligations under the contract are satisfied. At the end of each subsequent reporting period, the Company re-evaluates the probability of achievement of such development milestones and any related constraint, and if necessary, adjusts its estimate of the overall transaction price on a cumulative catch-up basis in earnings in the period of the adjustment.

•Royalties and commercial milestone payments: For arrangements that include sales-based royalties, including commercial milestone payments based on pre-specified level of sales, the Company recognizes revenue at the later of (i) when the related sales occur, or (ii) when the performance obligation to which some or all of the royalty has been allocated has been satisfied (or partially satisfied). Achievement of these royalties and commercial milestones may solely depend upon performance of the licensee.

(H) Recently Adopted Accounting Standards

In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement (“ASU 2018-13”), which simplifies the fair value measurement disclosure requirements. The Company adopted the new standard on April 1, 2020. The adoption of ASU 2018-13 did not have a material impact on the Company’s unaudited condensed consolidated financial statements and related disclosures.

In November 2018, the FASB issued ASU 2018-18, Collaborative Arrangements (Topic 808): Clarifying the Interaction between Topic 808 and Topic 606 (“ASU 2018-18”). This guidance is intended to reduce diversity in practice and clarify the interaction between Topic 808, Collaborative Arrangements, and Topic 606, Revenue from Contracts with Customers. ASU 2018-18 provided guidance on whether certain transactions between collaborative arrangement participants should be accounted for with revenue under Topic 606. The Company adopted the new standard on April 1, 2020. The adoption of ASU 2018-18 did not have a material impact on the Company’s unaudited condensed consolidated financial statements and related disclosures.

In August 2018, the FASB issued ASU No. 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40) (“ASU 2018-15”), which amends ASU No. 2015-05, Customers Accounting for Fees in a Cloud Computing Agreement, to help entities evaluate the accounting for fees paid by a customer in a cloud computing arrangement (hosting arrangement) by providing guidance for determining when the arrangement includes a software license. The most significant change will align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software and hosting arrangements that include an internal-use software license. Accordingly, the amendments in ASU 2018-15 require an

entity in a hosting arrangement that is a service contract to follow the guidance in Subtopic 350-40 to determine which implementation costs to capitalize as assets related to the service contract and which costs to expense. The Company adopted ASU 2018-15 using the prospective method as of April 1, 2020. The adoption of ASU 2018-15 did not have a material impact on the Company’s unaudited condensed consolidated financial statements and related disclosures.

Other recent accounting pronouncements issued by the FASB, (including its Emerging Issues Task Force), the American Institute of Certified Public Accountants, and the SEC did not, or are not believed by the Company to, have a material impact on the Company’s unaudited condensed consolidated financial statements and related disclosures.

(I) Recently Issued Accounting Standards

In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting, which provides optional expedients and exceptions for applying generally accepted accounting principles to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. These amendments apply only to contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. The amendments are effective for all entities as of March 12, 2020 through December 31, 2022. The expedients and exceptions provided by the amendments do not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022, except for hedging relationships existing as of December 31, 2022, that an entity has elected certain optional expedients for and that are retained through the end of the hedging relationship. The Company is currently evaluating the impact the adoption of this standard will have on its consolidated financial statements and related disclosures.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”), which requires the measurement and recognition of expected credit losses for financial assets held at amortized cost. ASU 2016-13 replaces the existing incurred loss impairment model with an expected loss model that requires the use of forward-looking information to calculate credit loss estimates. It also eliminates the concept of other-than-temporary impairment and requires credit losses on available-for-sale debt securities to be recorded through an allowance for credit losses instead of as a reduction in the amortized cost basis of the securities. ASU 2016-13 is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2019. Early adoption is permitted, including adoption in any interim period. In February 2020, the FASB issued ASU 2020-02, Financial Instruments-Credit Losses (Topic 326) and Leases (Topic 842) - Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 119 and Update to SEC Section on Effective Date Related to Accounting Standards Update No. 2016-02, Leases (Topic 842), which amends the effective date of the original pronouncement for smaller reporting companies. ASC 2016-13 and its amendments will be effective for annual and interim periods beginning after December 15, 2022 for smaller reporting companies. The Company is currently assessing the impact the adoption of this new standard will have on its consolidated financial statements and related disclosures.

In December 2019, the FASB issued ASU No. 2019-12, Simplifying the Accounting for Income Taxes (Topic 740) (“ASU 2019-12”), that eliminates certain exceptions to the general principles in ASC 740 related to intra-period tax allocation, deferred tax liability and general methodology for calculating income taxes. ASU 2019-12 also simplifies U.S. GAAP by making other changes for matters such as, franchise taxes that are partially based on income, transactions with a government that result in a step up in the tax basis of goodwill, separate financial statements of legal entities that are not subject to tax, and enacted changes in tax laws in interim periods. ASU 2019-12 is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2020. Early adoption is permitted, including adoption in any interim period. The Company is currently assessing the impact the adoption of this standard will have on its consolidated financial statements and related disclosures.

Investments and Fair Value Measurements

3 Months Ended

Jun. 30, 2020

Fair Value Disclosures [Abstract]

Investments and Fair Value Measurements

Fair Value Measurements

The following table summarizes the Company’s assets that require fair value measurements on a recurring basis and their respective input levels based on the fair value hierarchy (in thousands):


	Quoted Market Prices for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Fair Value
As of June 30, 2020
Money market funds ⁽¹⁾	$	4,988	$	—	$	—	$	4,988
Commercial paper ⁽²⁾	—		48,382		—		48,382
Municipal bonds⁽³⁾	—		16,617		—		16,617
Total assets	$	4,988	$	64,999	$	—	$	69,987

As of March 31, 2020
Money market funds ⁽¹⁾	$	11,348	$	—	$	—	$	11,348
Commercial paper⁽⁴⁾	—		7,042		—		7,042
Total assets	$	11,348	$	7,042	$	—	$	18,390

⁽¹⁾ Included in cash and cash equivalents.

⁽²⁾ Includes $41.6 million in cash and cash equivalents and $6.8 million in marketable securities.

⁽³⁾ Includes $8.4 million in cash and cash equivalents and $8.2 million in marketable securities.

⁽⁴⁾ Includes $4.0 million in cash and cash equivalents and $3.0 million in marketable securities.

There were no liabilities measured at fair value on a recurring basis as of June 30, 2020 or March 31, 2020.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Accrued Expenses

3 Months Ended

Jun. 30, 2020

Payables and Accruals [Abstract]

Accrued Expenses

As of June 30, 2020, and March 31, 2020, accrued expenses consisted of the following (in thousands):


	June 30, 2020		March 31, 2020
Accrued R&D expenses	$	15,437	$	15,500
Accrued compensation-related expenses	6,994		9,309
Accrued commercial expenses	3,190		818
Accrued professional service fees	763		1,126
Accrued other expenses	2,536		2,307
Total accrued expenses	$	28,920	$	29,060

Related Party Transactions	3 Months Ended
Related Party Transactions	Jun. 30, 2020
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions (A) Sumitomo Dainippon Pharma Co., Ltd. On December 27, 2019, the Company’s former controlling shareholder, Roivant Sciences Ltd. (“Roivant”), completed a transaction (the “Sumitomo-Roivant Transaction”) in which all of the Company’s outstanding common shares held directly or indirectly by Roivant and not already held by Sumitovant were transferred to Sumitovant, and Roivant transferred all of the outstanding equity of Sumitovant to Sumitomo Dainippon Pharma, resulting in Sumitovant directly, and Sumitomo Dainippon Pharma indirectly, owning 45,008,604, or approximately 50.2%, of the Company’s outstanding common shares on December 27, 2019. As of June 30, 2020, Sumitovant directly, and Sumitomo Dainippon Pharma indirectly, own 48,641,181, or approximately 54.0%, of the Company’s outstanding common shares. Sumitomo Dainippon Pharma Loan Agreement On December 27, 2019, the Company and its subsidiary, Myovant Sciences GmbH (“MSG”), entered into a Loan Agreement with Sumitomo Dainippon Pharma (the “Sumitomo Dainippon Pharma Loan Agreement”). Pursuant to the Sumitomo Dainippon Pharma Loan Agreement, Sumitomo Dainippon Pharma agreed to make revolving loans to the Company in an aggregate principal amount of up to $400.0 million. On December 30, 2019, the Company borrowed an initial amount of $113.7 million under the Sumitomo Dainippon Pharma Loan Agreement, the proceeds of which were used to repay all outstanding obligations of the Company to NovaQuest Capital Management and Hercules Capital, Inc. and to satisfy certain other fees and expenses. Additional funds may be drawn down by the Company once per calendar quarter, subject to certain terms and conditions, including consent of the Company’s board of directors. In addition, if Sumitomo Dainippon Pharma fails to own at least a majority of the Company’s outstanding common shares, it may become unlawful under Japanese law for Sumitomo Dainippon Pharma to fund loans to the Company, in which case the Company would not be able to continue to borrow under the Sumitomo Dainippon Pharma Loan Agreement. Interest is due and payable quarterly, and the outstanding principal amounts are due and payable in full on the five-year anniversary of the closing date of the Sumitomo Dainippon Pharma Loan Agreement. Loans under the Sumitomo Dainippon Pharma Loan Agreement are prepayable at any time without premium or penalty upon 10 business days’ prior written notice. Loans under the Sumitomo Dainippon Pharma Loan Agreement bear interest at a rate per annum equal to 3-month LIBOR plus a margin of 3% payable on the last day of each calendar quarter. The Company’s obligations under the Sumitomo Dainippon Pharma Loan Agreement are fully and unconditionally guaranteed by the Company and its subsidiaries. The loans and other obligations are senior unsecured obligations of the Company, MSG, and subsidiary guarantees. The Sumitomo Dainippon Pharma Loan Agreement includes customary representations and warranties and affirmative and negative covenants. The Sumitomo Dainippon Pharma Loan Agreement also includes customary events of default, including payment defaults, breaches of representations and warranties, breaches of covenants following any applicable cure period, cross acceleration to certain other debt, failure to pay certain final judgments, certain events relating to bankruptcy or insolvency, failure of material provisions of the loan documents to remain in full force and effect or any contest thereto by the Company or any of its subsidiaries and certain breaches by the Company under the Investor Rights Agreement. Upon the occurrence of an event of default, a default interest rate of an additional 5.0% will apply to the outstanding principal amount of the loans, Sumitomo Dainippon Pharma may terminate its obligations to make loans to the Company and declare the principal amount of loans to become immediately due and payable, and Sumitomo Dainippon Pharma may take such other actions as set forth in the Sumitomo Dainippon Pharma Loan Agreement. Upon the occurrence of certain bankruptcy and insolvency events, the obligations of Sumitomo Dainippon Pharma to make loans to the Company would automatically terminate and the principal amount of the loans would automatically become due and payable. In addition, if it becomes unlawful for Sumitomo Dainippon Pharma to maintain the loans under the Sumitomo Dainippon Pharma Loan Agreement or within 30 days of a change of control with respect to the Company, the Company would be required to repay the outstanding principal amount of the Loans. As of June 30, 2020, the outstanding loan balance of $193.7 million is classified as a long-term liability on the Company’s unaudited condensed consolidated balance sheets under the caption long-term debt, less current maturities (related party). As of June 30, 2020, approximately $206.3 million of borrowing capacity remains available to the Company, subject to the terms of the Sumitomo Dainippon Pharma Loan Agreement. Interest expense under the Sumitomo Dainippon Pharma Loan Agreement was $2.2 million for the three months ended June 30, 2020 and is included in interest expense (related party) in the Company’s unaudited condensed consolidated statements of operations. There was no interest expense (related party) for the three months ended June 30, 2019. On August 5, 2020, the Company obtained an incremental $200.0 million low-interest, five-year term loan commitment from Sumitomo Dainippon Pharma (see Note 12). Investor Rights Agreement On December 27, 2019, the Company entered into an Investor Rights Agreement with Sumitomo Dainippon Pharma and Sumitovant (the “Investor Rights Agreement”). Pursuant to the Investor Rights Agreement, among other things, the Company agreed, at the request of Sumitovant, to register for sale, under the Securities Act of 1933, common shares beneficially owned by Sumitovant, subject to specified conditions and limitations. In addition, the Company agreed to periodically provide Sumitovant (i) certain financial statements, projections, capitalization summaries and other information and (ii) access to the Company’s books, records, facilities and employees during the Company’s normal business hours as Sumitovant may reasonably request, subject to specified limitations. The Investor Rights Agreement also contains certain protections for the Company’s minority shareholders for so long as Sumitomo Dainippon Pharma or certain of its affiliates beneficially owns more than 50% of the Company’s common shares. These protections include: (i) a requirement that Sumitovant vote its shares for the election of independent directors in accordance with the recommendation of the Company’s board of directors (the “board”) or in the same proportion as the shareholders not affiliated with Sumitovant vote their shares; (ii) a requirement that the audit committee of the Company’s board be composed solely of three independent directors; (iii) a requirement that any transaction proposed by Sumitomo Dainippon Pharma or certain of its affiliates that would increase Sumitomo Dainippon Pharma’s beneficial ownership to over 60% of the outstanding voting power of the Company must be approved by the Company’s audit committee (if occurring prior to December 27, 2022), and be conditioned on the approval of shareholders not affiliated with Sumitovant approving the transaction by a majority of the common shares held by such shareholders; and a requirement that any related person transactions between Sumitomo Dainippon Pharma or certain of its affiliates and the Company must be approved by the Company’s audit committee. Pursuant to the Investor Rights Agreement, the Company also agreed that at all times that Sumitomo Dainippon Pharma beneficially owns more than 50% of the Company’s common shares, Sumitomo Dainippon Pharma, by purchasing common shares in the open market or from the Company in certain specified circumstances, will have the right to maintain its percentage ownership in the Company’s common shares in the event of a financing event or acquisition event conducted by the Company, or specified other events, subject to specific conditions. (B) Sumitovant On May 18, 2020, the Company and Sumitovant entered into a consulting agreement pursuant to which Sumitovant provides consulting services to the Company to support the Company in commercial planning, commercial launch activities and implementation. Adele Gulfo, Sumitovant’s Chief Business and Commercial Development Officer and a member of the Company’s board of directors, provides services to the Company on behalf of Sumitovant under the agreement. The term of the engagement is through November 11, 2020, or such earlier time as the Company hires a Chief Commercial Officer, and may be renewed upon the mutual written consent of the parties. Either the Company or Sumitovant may terminate the engagement under the agreement at any time for any reason by giving not less than 15 days prior written notice thereof to the other party. The consulting services will be provided with the aggregate fees not to exceed a total of $120,000 without the Company’s prior written approval. For the three months ended June 30, 2020, the Company incurred $114,000 of expense under this consulting agreement, which is included in general and administrative (“G&A”) expenses in the accompanying unaudited condensed consolidated statements of operations. (C) Sunovion Pharmaceuticals Inc. On August 1, 2020, the Company's subsidiary, MSG, entered into a Market Access Services Agreement (the “Market Access Services Agreement”) with Sunovion Pharmaceuticals Inc. (“Sunovion”), a subsidiary of Sumitomo Dainippon Pharma (see Note 12). (D) Roivant Sciences Ltd. As a result of the closing of the Sumitomo-Roivant Transaction described above, on December 27, 2019 all of the Company’s outstanding common shares held directly or indirectly by Roivant and not already held by Sumitovant were transferred to Sumitovant, and Roivant transferred all of the outstanding equity of Sumitovant to Sumitomo Dainippon Pharma. As a result of the transfer of these common shares, Roivant no longer beneficially owns any common shares of the Company. On December 27, 2019, the then existing Information Sharing and Cooperation Agreement between the Company and Roivant, the then existing Services Agreements between the Company and certain of its subsidiaries and Roivant and certain of its subsidiaries, and the then existing Option Agreement between the Company and Roivant were terminated. For three months ended June 30, 2019, the Company paid or reimbursed Roivant approximately $0.2 million under the terms of the then existing Services Agreements. In addition, the Company recorded share-based compensation expense allocated from Roivant of less than $0.1 million for the three months ended June 30, 2019. No amounts were incurred during the three months ended June 30, 2020. Roivant purchased 2,424,242 of the Company’s common shares in the Company’s June 4, 2019 underwritten public equity offering at the same price offered to the public of $8.25 per common share, for a total purchase price of $20.0 million (see Note 7).

Income Taxes	3 Months Ended
Income Taxes	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income TaxesThe Company is not subject to taxation under the laws of Bermuda since it was organized as a Bermuda Exempted Limited Company, for which there is no current tax regime. The Company’s income tax expense is primarily based on income taxes in the U.S. for federal, state and local taxes. The Company’s effective tax rate for the three months ended June 30, 2020 and 2019 was (2.09)% and (0.46)%, respectively. The Company’s effective tax rate is driven by the Company’s jurisdictional earnings by location and a valuation allowance that eliminates the Company’s global net deferred tax assets. The Company assesses the realizability of the deferred tax assets at each balance sheet date based on available positive and negative evidence in order to determine the amount which is more likely than not to be realized and records a valuation allowance as necessary. In response to the COVID-19 pandemic, many governments have enacted or are contemplating measures to provide aid and economic stimulus. These measures include deferring the due dates of tax payments and other changes to income and non-income-based-tax laws as well as providing direct government assistance through grants and forgivable loans. On March 27, 2020, the U.S. Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) was enacted in response to the COVID-19 pandemic and the negative impacts that it is having on the global economy and U.S. companies. The CARES Act includes measures to assist companies, including temporary changes to income and non-income-based tax laws. The Company has implemented certain provisions of the CARES Act, such as deferring employer payroll taxes through the end of calendar year 2020. As of June 30, 2020, the Company has deferred $0.8 million of employer payroll taxes, of which 50% are required to be deposited by December 2021 and the remaining 50% by December 2022. The deferred payroll tax liability is included in other liabilities on the accompanying unaudited condensed consolidated balance sheet.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References + Details

Shareholders' Deficit	3 Months Ended
Shareholders' Deficit	Jun. 30, 2020
Equity [Abstract]
Shareholders' Deficit	Shareholders’ Deficit (A) At-the-Market Equity Offering Program In April 2018, the Company entered into a sales agreement (the “Sales Agreement”) with Cowen and Company, LLC (“Cowen”), to sell its common shares having an aggregate offering price of up to $100.0 million from time to time through an “at-the-market” equity offering program under which Cowen acts as the Company’s agent. During the three months ended June 30, 2019, the Company issued and sold 106,494 of its common shares under the Sales Agreement. The common shares were sold at a weighted-average price of $24.65 per common share for aggregate net proceeds to the Company of approximately $2.5 million after deducting underwriting commissions paid by the Company. No shares were sold under the Sales Agreement during the three months ended June 30, 2020. As of June 30, 2020, the Company had approximately $10.4 million of capacity available to it under its “at-the-market” equity offering program. (B) Underwritten Public Equity Offering of Common Shares On June 4, 2019, the Company completed an underwritten public equity offering of 17,424,243 of its common shares at a public offering price of $8.25 per common share. After deducting the underwriting discounts and commissions and offering costs paid by the Company, the net proceeds to the Company in connection with the underwritten public equity offering, including from the exercise of the underwriters’ option to purchase additional common shares, were approximately $134.5 million.

Share-Based Compensation

3 Months Ended

Jun. 30, 2020

Share-based Payment Arrangement [Abstract]

Share-Based Compensation

(A) Myovant 2016 Equity Incentive Plan

In June 2016, the Company adopted its 2016 Equity Incentive Plan, as amended (the “2016 Plan”), under which 4.5 million common shares were originally reserved for issuance. Pursuant to the “evergreen” provision contained in the 2016 Plan, the number of common shares reserved for issuance under the 2016 Plan automatically increases on April 1 of each year, commencing on (and including) April 1, 2017 and ending on (and including) April 1, 2026, in an amount equal to 4% of the total number of shares of the Company’s capital stock outstanding on March 31 of the preceding fiscal year, or a lesser number of shares as determined by the Company’s board of directors. On April 1, 2020, the number of common shares authorized for issuance increased automatically by 3.6 million shares in accordance with the evergreen provision of the 2016 Plan. As of June 30, 2020, a total of 1.2 million common shares were available for future issuance under the 2016 Plan.

The Company’s employees, directors, officers and consultants are eligible to receive non-qualified and incentive stock options, stock appreciation rights, restricted stock awards, restricted stock unit awards, and other share awards under the 2016 Plan.

(B) Stock Options

A summary of stock option activity under the Company’s 2016 Plan is as follows:


			Number of Options
Options outstanding at March 31, 2020			7,723,302
Granted			1,571,323
Exercised			(302,076)
Forfeited			(344,471)

Options outstanding at June 30, 2020			8,648,078
Options vested and expected to vest at June 30, 2020			8,648,078

Options exercisable at June 30, 2020			3,236,128

A summary of restricted stock award and restricted stock unit activity under the Company’s 2016 Plan is as follows:


			Number of Shares
Unvested balance at March 31, 2020			1,280,312
Granted			2,298,339
Vested			(71,450)
Forfeited			(171,320)
Unvested balance at June 30, 2020			3,335,881

(D) Performance Stock Units

A summary of performance stock unit activity under the Company's 2016 Plan is as follows:


			Number of Shares
Unvested balance at March 31, 2020			299,870
Granted			568,976
Vested			—
Forfeited			(37,415)
Unvested balance at June 30, 2020			831,431

The vesting of performance stock units requires that certain performance conditions are achieved during the performance period and is subject to the employee’s continued service requirements. During the three months ended June 30, 2020, the Company recognized share-based compensation expense of $0.6 million related to performance stock units for which it determined the vesting to be probable.

(E) Share-Based Compensation Expense

Share-based compensation expense was as follows (in thousands):


	Three Months Ended June 30,
	2020		2019
Share-based compensation expense recognized as:
R&D expenses	$	4,024	$	2,548
G&A expenses	3,788		3,904
Total	$	7,812	$	6,452

Share-based compensation expense is included in R&D and G&A expenses in the accompanying unaudited condensed consolidated statements of operations consistent with the grantee’s salary. Total unrecognized share-based compensation expense was approximately $69.3 million as of June 30, 2020 and is expected to be recognized over a weighted-average period of approximately 3.0 years.

Leases

3 Months Ended

Jun. 30, 2020

Leases [Abstract]

Leases

At June 30, 2020, the Company has lease agreements, as lessee, for office space in Brisbane, California, which are accounted for as operating leases. The lease agreements do not contain a specified implicit interest rate; therefore, the Company’s estimated incremental borrowing rate was used to determine the present value of future minimum lease payments. The lease term for all of the Company’s leases includes the non-cancelable period of the lease and any periods covered by renewal options that the Company is reasonably certain to exercise. The Company currently has no other significant operating, financing, or short-term leases.

The components of operating lease expense for the Company’s office space were as follows (in thousands):


	Three Months Ended June 30,
	2020		2019
Operating lease cost	$	729	$	519

Variable lease cost ⁽¹⁾	90		9
Total operating lease cost	$	819	$	528

⁽¹⁾ Variable lease cost includes common area maintenance and utilities costs which are not included in operating lease liabilities and which are expensed as incurred.

Certain information related to the Company’s operating lease right-of-use assets and operating lease liabilities for its Brisbane, California office space are as follows (in thousands):


	Three Months Ended June 30,
	2020		2019
Cash paid for operating lease liabilities	$	729	$	496
Operating lease right-of-use assets obtained in exchange for new operating lease liabilities	$	—	$	9,181

As of June 30, 2020, the Company’s operating leases had a weighted average remaining lease term of 5.4 years and a weighted average discount rate of 12.3%.

As of June 30, 2020, maturities of operating lease liabilities were as follows (in thousands):


Years Ended March 31,
2021 (remainder of year)	$	2,210
2022	3,028
2023	3,127
2024	3,053
2025	2,409
Thereafter	2,898
Total lease payments	16,725
Less imputed interest	(4,569)
Present value of future minimum lease payments	12,156
Less operating lease liability, current portion	(1,585)
Operating lease liability, long-term portion	$	10,571

Development and Commercialization Agreement

3 Months Ended

Jun. 30, 2020

Commitments and Contingencies Disclosure [Abstract]

Development and Commercialization Agreement

On March 30, 2020, the Company entered an exclusive license agreement for Richter to commercialize relugolix combination tablet for uterine fibroids and endometriosis in Europe, the Commonwealth of Independent States including Russia, Latin America, Australia, and New Zealand (the “Development and Commercialization Agreement”). Under the agreement, the Company received an upfront payment of $40.0 million on March 31, 2020, is eligible to receive up to $40.0 million in regulatory milestone payments (of which $10.0 million was received in April 2020), $107.5 million in sales-related milestones, and tiered royalties on net sales following regulatory approval. Under the terms of the agreement, the Company will continue to lead global development of relugolix combination tablet. The Company has also agreed to assist Richter in transferring manufacturing technology from the Company’s contract manufacturing organizations to Richter to enable Richter to manufacture relugolix combination tablet. If requested by Richter, the Company has agreed to supply Richter with quantities of relugolix combination tablet for its territories pursuant to the Company’s agreements with its contract manufacturing organizations. Richter will be responsible for local clinical development, manufacturing, and all commercialization activities for its territories. The Company has also granted Richter an option to collaborate with the Company on relugolix combination tablet for future indications in women’s health other than fertility.

The Company determined that the transaction price under the Development and Commercialization Agreement totaled $50.0 million, consisting of the upfront payment of $40.0 million received on March 31, 2020 and a $10.0 million regulatory milestone payment received in April 2020. As of June 30, 2020, the Company did not include any other regulatory milestones, sales-related milestones, or royalties on net sales following regulatory approval in the transaction price given the substantial uncertainty related to their achievement.

The Company concluded that Richter represented a customer and applied relevant guidance from ASC 606 to evaluate the accounting under the Development and Commercialization Agreement. In accordance with this guidance, the Company identified one material combined performance obligation to grant a license to Richter to certain of its intellectual property and to deliver certain clinical and regulatory data packages for relugolix combination therapy, the drug used for both potential indications of uterine fibroids and endometriosis. The Company determined that its grant of a license to Richter to certain of its intellectual property was not distinct from the delivery of certain clinical and regulatory data packages pertaining to relugolix combination therapy. In evaluating the appropriate measure for the Company's performance under the combined performance obligation, the Company determined that revenues should be recognized as data packages are issued to Richter based on the relative value of the data packages delivered to date compared to the totality of the data packages it is obligated to deliver under the Development and Commercialization Agreement. The Company evaluates the measure of progress each reporting period and, if necessary, adjusts the measure of performance and related revenue recognition. Based upon the Company's assessment of its progress toward delivering relugolix combination therapy clinical and regulatory data packages to Richter, the Company concluded that as of June 30, 2020, it had satisfied approximately two-thirds of the combined performance obligation. As a result, the Company recognized $33.3 million of the transaction price as revenue during the three months ended June 30, 2020. As the Company currently expects to deliver the remaining substantive relugolix combination therapy data packages to Richter in the fourth quarter of the fiscal year ending March 31, 2021, the Company has recorded the remaining $16.7 million of the transaction price as deferred revenue, a current liability, on the unaudited condensed consolidated balance sheet as of June 30, 2020.

Contract Balances

Upfront payments and fees are recorded as deferred revenue upon receipt or when due, and may require deferral of revenue recognition to a future period until the Company performs its obligations under these agreements. Amounts payable to the Company are recorded as accounts receivable when the Company's rights to consideration is unconditional. The following table presents changes in the Company’s total contract liabilities during the three months ended June 30, 2020 (in thousands):


	Balance at						Balance at
	March 31, 2020		Additions		Deductions		June 30, 2020

Contract liabilities:
Deferred revenue, current	$	40,000	$	10,000	$	(33,333)	$	16,667

Deferred revenue related to the Richter Development and Commercialization Agreement as of June 30, 2020, which was comprised of the $50.0 million transaction price, including a $40.0 million upfront payment received in March, 2020 and a $10.0 million regulatory milestone received in April, 2020, less the revenue recognized from the effective date of the contract, will be recognized as revenue as the combined performance obligation is satisfied.

The Company had no receivables or contract assets as of March 31, 2020 or June 30, 2020. During the three months ended June 30, 2020, the Company's contract liabilities, which consisted of deferred revenue, decreased by $23.3 million. This decrease included deductions of $33.3 million related to revenue recognized during the three months ended June 30, 2020, partially offset by additions of $10.0 million related to a regulatory milestone received in April, 2020.

Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Jun. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies (A) Legal Contingencies The Company may be, from time to time, a party to various disputes and claims arising from normal business activities. The Company accrues for loss contingencies when available information indicates that it is probable that a liability has been incurred and the amount of such liability can be reasonably estimated. For cases in which the Company believes that a reasonably possible loss exists, the Company discloses the facts and circumstances of the loss contingency, including an estimable range, if possible. The Company is currently not involved in any material legal proceedings. (B) Contract Service Providers In the normal course of business, the Company enters into agreements with contract service providers to assist in the performance of its R&D and clinical and commercial manufacturing activities. Subject to required notice periods and the Company’s obligations under binding purchase orders, the Company can elect to discontinue the work under these agreements at any time. The Company expects to enter into additional collaborative research, contract research, clinical and commercial manufacturing, and supplier agreements in the future, which may require upfront payments and long-term commitments of capital resources. (C) Indemnification Agreements The Company has agreed to indemnify its officers and directors for certain events or occurrences, subject to certain limits, while the officer or director was serving at the Company’s request in such capacity. The maximum amount of potential future indemnification liability is unlimited; however, the Company holds directors’ and officers’ liability insurance which limits the Company’s exposure and may enable it to recover a portion of any future amounts paid. In the normal course of business, the Company also enters into contracts and agreements with service providers and other parties with which it conducts business that contain indemnification provisions pursuant to which the Company has agreed to indemnify the party against certain types of third-party claims. The Company has agreed to indemnify Sumitomo Dainippon Pharma against certain losses, claims, liabilities and related expenses incurred by Sumitomo Dainippon Pharma, subject to the terms of the Sumitomo Dainippon Pharma Loan Agreement and the Investor Rights Agreement. The Company has not experienced any material losses related to these indemnification obligations, and no material claims with respect thereto were outstanding. The Company does not expect significant claims related to these indemnification obligations and, consequently, concluded that the fair value of these obligations is negligible, and no related accruals have been established. (D) Takeda Agreements Under the Takeda License Agreement, the Company will pay Takeda a fixed, high single-digit royalty on net sales of relugolix and MVT-602 products in the Company’s territory, subject to certain agreed reductions. Takeda will pay the Company a royalty at the same rate on net sales of relugolix products for prostate cancer in the Takeda Territory, subject to certain agreed reductions. Royalties are required to be paid, on a product-by-product and country-by-country basis, until the latest to occur of the expiration of the last to expire valid claim of a licensed patent covering such product in such country, the expiration of regulatory exclusivity for such product in such country, or 10 years after the first commercial sale of such product in such country. Under the Takeda License Agreement, there was no upfront payment and there are no payments upon the achievement of clinical development or marketing approval milestones. As the amount and timing of any potential future payments under the Takeda License Agreement are not probable and estimable, no such potential commitments have been included in the unaudited condensed consolidated balance sheet. If the Takeda License Agreement is terminated in its entirety or with respect to relugolix for prostate cancer, other than for safety reasons or by the Company for Takeda’s uncured material breach, prior to receipt of the first regulatory approval of relugolix for prostate cancer in Japan, then the Company must either reimburse Takeda for its out of pocket costs and expenses directly incurred in connection with Takeda’s completion of the relugolix development for prostate cancer, up to an agreed upon cap, or complete by itself the conduct of any clinical studies of relugolix for prostate cancer that are ongoing as of the effective date of such termination, at its cost and expense Pursuant to a Commercial Manufacturing and Supply Agreement entered into with Takeda (the “Takeda Commercial Supply Agreement”), Takeda agreed to supply the Company and the Company agreed to obtain from Takeda certain quantities of relugolix drug substance according to agreed-upon quality specifications. For relugolix drug substance manufactured or delivered on or after December 31, 2019, the Company will pay Takeda a price per kilogram of relugolix drug substance to be agreed upon between the parties at the beginning of each fiscal year. The initial term of the Takeda Commercial Supply Agreement began on May 30, 2018 and will continue for five years. At the end of the initial term, the Takeda Commercial Supply Agreement will automatically renew for successive one-year terms, unless either party gives notice of termination to the other at least 12 months prior to the end of the then-current term. The Takeda Commercial Supply Agreement may be terminated by either party upon 90 days’ notice of an uncured material breach of its terms by the other party, or immediately upon notice to the other party of a party’s bankruptcy. Each party will also have the right to terminate the Takeda Commercial Supply Agreement, in whole or in part, for any reason upon 180 days’ prior written notice to the other party, provided that any then-open purchase orders will remain in effect and be binding on both parties. The Takeda Commercial Supply Agreement, including any then-open purchase orders thereunder, will terminate immediately upon the termination of the Takeda License Agreement in accordance with its terms.

Subsequent Events	3 Months Ended
Subsequent Events	Jun. 30, 2020
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events (A) Sumitomo Dainippon Pharma Sumitomo Dainippon Pharma Loan Agreement Pursuant to the terms of the Sumitomo Dainippon Pharma Loan Agreement (see Note 5(A)), the Company is permitted to draw down funds once per calendar quarter, subject to certain conditions. In July 2020, the Company borrowed $60.0 million under the Sumitomo Dainippon Pharma Loan Agreement. Subsequent to this draw, approximately $146.3 million of borrowing capacity remains available to the Company. Sumitomo Dainippon Pharma Loan Commitment On August 5, 2020, the Company obtained a debt commitment letter (the “2020 Commitment Letter”) from Sumitomo Dainippon Pharma, pursuant to which, subject to the terms and conditions set forth therein, Sumitomo Dainippon Pharma has committed to provide an additional $200.0 million in unsecured revolving commitments (the “New Credit Facility”), the proceeds of which may be used for business operating expenditures of the Company and its subsidiaries. The commitments are in addition to the commitments made available to the Company and its subsidiaries by Sumitomo Dainippon Pharma under the existing Sumitomo Dainippon Pharma Loan Agreement (see Note 5(A)). The New Credit Facility shall mature on the fifth anniversary of the closing of the New Credit Facility. Sumitomo Dainippon Pharma will have the discretion, to require certain prepayments as Sumitomo Dainippon Pharma may request and/or to not allow the Company to draw down any remaining funds under the New Credit Facility, upon the occurrence of certain material business development transactions. In addition, as a condition to entering into the New Credit Facility, the Company shall be required to enter into an information sharing agreement with Sumitovant which will be on terms to be agreed between the Company and Sumitovant. The terms and conditions of the New Credit Facility shall otherwise be substantially identical to the terms of the existing Sumitomo Dainippon Pharma Loan Agreement, including with respect to the interest rate margins, except as otherwise agreed between the Company and Sumitomo Dainippon Pharma. (B) Sunovion Pharmaceuticals Inc. Market Access Services Agreement On August 1, 2020, the Company’s subsidiary, MSG, entered into the Market Access Services Agreement with Sunovion, a subsidiary of Sumitomo Dainippon Pharma. Pursuant to the Market Access Services Agreement, among other things, Sunovion has agreed to provide to MSG certain market access services with respect to the distribution and sale of relugolix monotherapy (relugolix 120 mg) (“Prostate Cancer Product”) and relugolix combination tablet (relugolix 40 mg, estradiol 1.0 mg and norethindrone acetate 0.5 mg) (“Women’s Health Product,” and collectively with Prostate Cancer Product, the “Products”, and each a “Product”), including, among other things: (i) adding the Products to Sunovion’s agreements with its third party logistics providers; (ii) adding the Women’s Health Product to certain of Sunovion’s contracts with wholesalers, group purchasing organizations and integrated delivery networks and negotiating rates for the Products with certain market access customers; (iii) providing order-to-cash services; (iv) providing certain employees to provide market access account director services; (v) performing activities required in connection with supporting and maintaining contracts between the Company and market access customers for the coverage, purchase, or dispensing of the Products; (vi) managing the validation, processing and payment of rebates, chargebacks, and certain administrative, distribution and service fees related to the Products; (vii) providing MSG with price reporting metrics and other information required to allow the Company to comply with applicable government price reporting requirements; (viii) coordinating with MSG and any applicable wholesalers and distributors to address any recalls, investigations, or product holds; (ix) configuring, or causing to be configured, the appropriate software systems to enable Sunovion to perform its obligations under the Market Access Services Agreement; and (x) providing training and certain other ancillary support services to facilitate the foregoing. MSG, in turn, appointed Sunovion as the exclusive distributor of the Women’s Health Product and a non-exclusive distributor of the Prostate Cancer Product, each in the United States, including all of its territories and possessions. In order to facilitate Sunovion’s provision of these services, MSG agreed, among other things, to: (i) grant Sunovion a non-exclusive license under all intellectual property owned or controlled by MSG, solely for Sunovion’s use in connection with its performance of the contemplated services; (ii) provide Sunovion periodic reports of sales projections and estimated volume requirements, as well as such other information as Sunovion reasonably requests or may need to perform the services; (iii) comply with the provisions of any agreements between Sunovion and third parties pursuant to which the Products will be distributed or sold; (iv) cooperate with certain investigations related to orders and audits of MSG’s quality systems solely relate, as reasonably determined by Myovant, to Sunovion’s performance of certain regulatory services, at Sunovion’s costs; and (v) promptly notify Sunovion in the event relugolix is recalled. As consideration for the services, MSG will pay Sunovion an agreed-upon monthly service charge for each of the first two years of the Market Access Services Agreement term and any agreed regulatory and training service charges. After the second year of the Market Access Services Agreement term, the monthly service charges will be determined by the parties. In addition, MSG also agreed to (x) reimburse Sunovion for any pass-through expenses it incurs while providing the services, and (y) establish an escrow fund for use by Sunovion when managing any rebates, chargebacks and similar fees. The Market Access Services Agreement also contains customary representations and warranties by the parties and customary provisions related to confidentiality, indemnification and insurance. The initial term of the Market Access Services Agreement is three years. Thereafter, the term will be automatically extended for one-year periods, unless either party provides notice of its intent not to renew the Market Access Services Agreement at least nine (9) months prior to the expiration of the applicable term. Either party may also terminate the Market Access Services Agreement prior to the end of its term in the event of an uncured material breach by the other party, if there are certain changes of law, or if such other party becomes insolvent or undergoes a change of control. MSG may also terminate the Market Access Services Agreement with respect to one or both Products if Sunovion fails to satisfy certain market access milestones or for convenience upon payment of a break-up fee.

Summary of Significant Accounting Policies (Policies)	3 Months Ended
Summary of Significant Accounting Policies (Policies)	Jun. 30, 2020
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The Company’s fiscal year ends on March 31, and its first three fiscal quarters end on June 30, September 30 and December 31. The Company has determined that it has one operating and reporting segment as it allocates resources and assesses financial performance on a consolidated basis. The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and disclosures required by U.S. GAAP for complete financial statements. These unaudited condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended March 31, 2020, filed with the U.S. Securities and Exchange Commission (the “SEC”) on May 18, 2020. The unaudited consolidated balance sheet at March 31, 2020 has been derived from the audited consolidated financial statements at that date. In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary to present fairly the financial position of the Company and its results of operations and cash flows for the interim periods presented have been included. Operating results for the three months ended June 30, 2020 are not necessarily indicative of the results that may be expected for the fiscal year ending March 31, 2021, for any other interim period or for any other future year. There have been no significant changes in the Company’s accounting policies from those disclosed in its Annual Report on Form 10-K for the fiscal year ended March 31, 2020, filed with the SEC on May 18, 2020. Any reference in these notes to applicable accounting guidance is meant to refer to the authoritative U.S. GAAP included in the Accounting Standards Codification (“ASC”) and Accounting Standards Update (“ASU”), issued by the Financial Accounting Standards Board (“FASB”). The unaudited condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. The Company has no unconsolidated subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. The Company has evaluated whether there are conditions and events, considered in the aggregate, that raise substantial doubt about the Company’s ability to continue as a going concern within one year after the date the unaudited condensed consolidated financial statements are issued. During the three months ended June 30, 2020, the Company incurred net losses of $32.9 million and used $62.0 million of cash and cash equivalents in operations. The Company expects to continue to incur significant and increasing operating losses and negative operating cash flows as it continues to develop its product candidates and prepares for potential future regulatory approvals and commercialization of relugolix combination tablet and relugolix monotherapy tablet. In addition, the Company expects that its outstanding debt levels will increase in future periods, which will result in an increase in its quarterly interest payment obligations. The Company has not generated any product revenue to date and does not expect to generate product revenue unless and until it obtains regulatory approval for at least one of its product candidates. Based on its current operating plan, the Company expects that its existing cash, cash equivalents, marketable securities, and its ability to borrow under the terms of the Sumitomo Dainippon Pharma Loan Agreement (See Note 5(A)) will be sufficient to fund its operating expenses and capital expenditure requirements at least through the end of the Company’s fiscal year ending March 31, 2021. This estimate is based on the Company’s current assumptions, including assumptions relating to its ability to manage its spend, that might prove to be wrong, and it could use its available capital resources sooner than it currently expects. Current cash, cash equivalents, marketable securities and amounts available under the Sumitomo Dainippon Pharma Loan Agreement will not be sufficient to enable the Company to complete all necessary development and regulatory activities and commercially launch relugolix combination tablet or relugolix monotherapy tablet. The Company anticipates that it will continue to incur net losses and negative operating cash flows for the foreseeable future. To continue as a going concern, the Company will need, among other things, additional capital resources. The Company continually assesses multiple options to obtain additional funding to support its operations, including through financing activities in public or private capital markets. Management can provide no assurances that any sources of a sufficient amount of financing will be available to the Company on favorable terms, if at all. Although the Company expects to draw under the Sumitomo Dainippon Pharma Loan Agreement on a quarterly basis, such draws are contingent upon the consent of the Company’s board of directors. In addition, if Sumitomo Dainippon Pharma fails to own at least a majority of the Company’s outstanding common shares, it may become unlawful under Japanese law for Sumitomo Dainippon Pharma to fund loans to the Company, in which case the Company would not be able to continue to borrow under the Sumitomo Dainippon Pharma Loan Agreement. ASC 240-40, Going Concern, does not allow the Company to consider future financing activities that are uncertain in its assessment of the Company’s future cash burn for the purpose of its liquidity assessment. On August 5, 2020, the Company obtained an additional $200.0 million low-interest, five-year term loan commitment from Sumitomo Dainippon Pharma (see Note 12). Due to these uncertainties, there is substantial doubt about the Company’s ability to continue as a going concern. The unaudited condensed consolidated financial statements and footnotes have been prepared on the basis that the Company will continue as a going concern, and do not include any adjustments to reflect the possible future effects on the recoverability and classification of assets or the amounts and classification of liabilities that may result from the possible inability of the Company to continue as a going concern.
Use of Estimates	Use of EstimatesThe preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions in certain circumstances that affect the amounts reported in the consolidated financial statements and accompanying notes. The Company regularly evaluates estimates and assumptions related to assets and liabilities, and disclosures of contingent assets and liabilities at the dates of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting periods. Determinations in which management uses subjective judgments include, but are not limited to, the evaluation of the Company’s ability to continue as a going concern, revenue recognition, share-based compensation expenses, research and development (“R&D”) expenses and accruals, leases, and income taxes. The Company bases its estimates and assumptions on historical experience and on various other factors that it believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period, that are not readily apparent from other sources. Estimates and assumptions are periodically reviewed in light of changes in circumstances, facts, or experience. Changes in estimates and assumptions are reflected in reported results in the period in which they become known. Actual results could differ from those estimates.
Net Loss Per Common Share	Net Loss per Common ShareBasic net loss per common share is computed by dividing net loss applicable to common shareholders by the weighted-average number of common shares outstanding during the period, reduced, when applicable, for outstanding yet unvested shares of restricted common stock. The computation of diluted net loss per common share is based on the weighted-average number of common shares outstanding during the period plus, when their effect is dilutive, incremental shares consisting of shares subject to stock options, restricted stock units, restricted stock awards, performance stock units, and warrants. In periods in which the Company reports a net loss, all common share equivalents are deemed anti-dilutive such that basic net loss per common share and diluted net loss per common share are equal. Potentially dilutive common shares have been excluded from the diluted net loss per common share computations in all periods presented because such securities have an anti-dilutive effect on net loss per common share due to the Company’s net loss. There are no reconciling items used to calculate the weighted-average number of total common shares outstanding for basic and diluted net loss per common share.
Cash, Cash Equivalents and Restricted Cash	Cash, Cash Equivalents, and Restricted Cash Cash and cash equivalents include cash deposits in banks and all highly liquid investments that are readily convertible to cash. The Company considers all highly liquid investments with a maturity of three months or less at the time of purchase to be cash equivalents. Restricted cash consists of legally restricted deposits held as compensating balances against the Company’s corporate credit card program and irrevocable standby letters of credit provided as security for the Company’s office lease and sublease.
Marketable Securities	Marketable SecuritiesInvestments in marketable securities are held in a custodial account at a financial institution and managed by the Company’s investment advisor based on the Company’s investment guidelines. The Company considers all highly liquid investments in securities with a maturity of greater than three months at the time of purchase to be marketable securities. The Company classifies its marketable securities as available-for-sale at the time of purchase and reevaluates such designation at each balance sheet date. Unrealized gains and losses on available-for-sale securities are excluded from earnings and are recorded in accumulated other comprehensive (loss) income until realized. Any unrealized losses are evaluated for other-than-temporary impairment at each balance sheet date. Realized gains and losses are determined based on the specific identification method and are recorded in other income, net. The Company does not intend to sell its securities that are in an unrealized loss position, and it is unlikely that the Company will be required to sell its securities before recovery of their amortized cost basis, which may be maturity. Factors considered in determining whether a loss is temporary include the length of time and extent to which the fair value has been less than the amortized cost basis and whether the Company intends to sell the security or whether it is more likely than not that the Company would be required to sell the security before recovery of the amortized cost basis. See Note 3 for additional information.
Fair Value Measurements	Fair Value Measurements The Company utilizes fair value measurement guidance prescribed by accounting standards to value its financial instruments. The guidance establishes a fair value hierarchy for financial instruments measured at fair value that distinguishes between assumptions based on market data (observable inputs) and the Company’s own assumptions (unobservable inputs). Observable inputs are inputs that market participants would use in pricing the asset or liability based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company’s assumptions about the inputs that market participants would use in pricing the asset or liability and are developed based on the best information available in the circumstances. Fair value is defined as the exchange price, or exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the reporting date. As a basis for considering market participant assumptions in fair value measurements, the guidance establishes a three-tier fair value hierarchy that distinguishes among the following: •Level 1—Valuations are based on unadjusted quoted prices in active markets for identical assets or liabilities that the Company has the ability to access. •Level 2—Valuations are based on quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active and models for which all significant inputs are observable, either directly or indirectly. •Level 3—Valuations are based on inputs that are unobservable (supported by little or no market activity) and significant to the overall fair value measurement. To the extent the valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. Accordingly, the degree of judgment exercised by the Company in determining fair value is greatest for instruments categorized in Level 3. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. The Company’s financial instruments include cash, cash equivalents, marketable securities, accounts payable and debt obligations. Cash, cash equivalents, and accounts payable are stated at their respective historical carrying amounts, which approximate fair value due to their short-term nature. Marketable securities are recorded at their estimated fair value and are included in Level 2 of the fair value hierarchy.
Revenue Recognition	Revenue RecognitionIn May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), as subsequently amended, which outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers. The core principle of the revenue model is that an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. The Company was required to adopt ASC 606 on April 1, 2018. As the Company did not have any effective contracts within the scope of this guidance prior to April 1, 2018, ASC 606 had no impact on the Company's consolidated financial statements and related disclosures upon adoption. In accordance with ASC 606, the Company recognizes revenue when its customer obtains control of promised goods or services, in an amount that reflects the consideration which the Company expects to receive in exchange for those goods or services. To determine revenue recognition for arrangements that the Company determines are within the scope of ASC 606, the Company performs the following five steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when or as the Company satisfies a performance obligation. When applying the revenue recognition criteria of ASC 606 to license and collaboration agreements, the Company applies significant judgment when evaluating whether contractual obligations represent distinct performance obligations, allocating transaction price to performance obligations within a contract, determining when performance obligations have been met, assessing the recognition and future reversal of variable consideration, and determining and applying appropriate methods of measuring progress for performance obligations satisfied over time. These judgments are discussed in more detail below. •Licenses of intellectual property: If the licenses to intellectual property are determined to be distinct from the other performance obligations identified in the arrangement, the Company recognizes revenues from non-refundable, upfront fees allocated to the license when the license is transferred to the licensee and the licensee is able to use and benefit from the license. For licenses that are not distinct from other promises, the Company applies judgment to assess the nature of the combined performance obligation to determine whether the combined performance obligation is satisfied over time or at a point in time and, if over time, the appropriate method of measuring progress for purposes of recognizing revenue from non-refundable, upfront fees. The Company evaluates the measure of progress each reporting period and, if necessary, adjusts the related revenue recognition accordingly. •Milestone payments: At the inception of each arrangement that includes research, development or regulatory milestone payments, the Company evaluates whether the milestones are considered probable of being reached and estimates the amount to be included in the transaction price using the most likely amount method. If it is probable that a significant revenue reversal would not occur, the associated milestone value is included in the transaction price. Milestone payments that are not within the Company’s control or the licensee, such as regulatory approvals, are not considered probable of being achieved until those approvals are received. The transaction price is then allocated to each performance obligation on a relative standalone selling price basis, for which the Company recognizes revenue as or when the performance obligations under the contract are satisfied. At the end of each subsequent reporting period, the Company re-evaluates the probability of achievement of such development milestones and any related constraint, and if necessary, adjusts its estimate of the overall transaction price on a cumulative catch-up basis in earnings in the period of the adjustment. •Royalties and commercial milestone payments: For arrangements that include sales-based royalties, including commercial milestone payments based on pre-specified level of sales, the Company recognizes revenue at the later of (i) when the related sales occur, or (ii) when the performance obligation to which some or all of the royalty has been allocated has been satisfied (or partially satisfied). Achievement of these royalties and commercial milestones may solely depend upon performance of the licensee.
Recently Issued Accounting Pronouncements	Recently Adopted Accounting Standards In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement (“ASU 2018-13”), which simplifies the fair value measurement disclosure requirements. The Company adopted the new standard on April 1, 2020. The adoption of ASU 2018-13 did not have a material impact on the Company’s unaudited condensed consolidated financial statements and related disclosures. In November 2018, the FASB issued ASU 2018-18, Collaborative Arrangements (Topic 808): Clarifying the Interaction between Topic 808 and Topic 606 (“ASU 2018-18”). This guidance is intended to reduce diversity in practice and clarify the interaction between Topic 808, Collaborative Arrangements, and Topic 606, Revenue from Contracts with Customers. ASU 2018-18 provided guidance on whether certain transactions between collaborative arrangement participants should be accounted for with revenue under Topic 606. The Company adopted the new standard on April 1, 2020. The adoption of ASU 2018-18 did not have a material impact on the Company’s unaudited condensed consolidated financial statements and related disclosures. In August 2018, the FASB issued ASU No. 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40) (“ASU 2018-15”), which amends ASU No. 2015-05, Customers Accounting for Fees in a Cloud Computing Agreement, to help entities evaluate the accounting for fees paid by a customer in a cloud computing arrangement (hosting arrangement) by providing guidance for determining when the arrangement includes a software license. The most significant change will align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software and hosting arrangements that include an internal-use software license. Accordingly, the amendments in ASU 2018-15 require an entity in a hosting arrangement that is a service contract to follow the guidance in Subtopic 350-40 to determine which implementation costs to capitalize as assets related to the service contract and which costs to expense. The Company adopted ASU 2018-15 using the prospective method as of April 1, 2020. The adoption of ASU 2018-15 did not have a material impact on the Company’s unaudited condensed consolidated financial statements and related disclosures. Other recent accounting pronouncements issued by the FASB, (including its Emerging Issues Task Force), the American Institute of Certified Public Accountants, and the SEC did not, or are not believed by the Company to, have a material impact on the Company’s unaudited condensed consolidated financial statements and related disclosures. (I) Recently Issued Accounting Standards In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting, which provides optional expedients and exceptions for applying generally accepted accounting principles to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. These amendments apply only to contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. The amendments are effective for all entities as of March 12, 2020 through December 31, 2022. The expedients and exceptions provided by the amendments do not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022, except for hedging relationships existing as of December 31, 2022, that an entity has elected certain optional expedients for and that are retained through the end of the hedging relationship. The Company is currently evaluating the impact the adoption of this standard will have on its consolidated financial statements and related disclosures. In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”), which requires the measurement and recognition of expected credit losses for financial assets held at amortized cost. ASU 2016-13 replaces the existing incurred loss impairment model with an expected loss model that requires the use of forward-looking information to calculate credit loss estimates. It also eliminates the concept of other-than-temporary impairment and requires credit losses on available-for-sale debt securities to be recorded through an allowance for credit losses instead of as a reduction in the amortized cost basis of the securities. ASU 2016-13 is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2019. Early adoption is permitted, including adoption in any interim period. In February 2020, the FASB issued ASU 2020-02, Financial Instruments-Credit Losses (Topic 326) and Leases (Topic 842) - Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 119 and Update to SEC Section on Effective Date Related to Accounting Standards Update No. 2016-02, Leases (Topic 842), which amends the effective date of the original pronouncement for smaller reporting companies. ASC 2016-13 and its amendments will be effective for annual and interim periods beginning after December 15, 2022 for smaller reporting companies. The Company is currently assessing the impact the adoption of this new standard will have on its consolidated financial statements and related disclosures. In December 2019, the FASB issued ASU No. 2019-12, Simplifying the Accounting for Income Taxes (Topic 740) (“ASU 2019-12”), that eliminates certain exceptions to the general principles in ASC 740 related to intra-period tax allocation, deferred tax liability and general methodology for calculating income taxes. ASU 2019-12 also simplifies U.S. GAAP by making other changes for matters such as, franchise taxes that are partially based on income, transactions with a government that result in a step up in the tax basis of goodwill, separate financial statements of legal entities that are not subject to tax, and enacted changes in tax laws in interim periods. ASU 2019-12 is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2020. Early adoption is permitted, including adoption in any interim period. The Company is currently assessing the impact the adoption of this standard will have on its consolidated financial statements and related disclosures.

- Definition

Disclosure of accounting policy for revenue from contract with customer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130561-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 20
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130566-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 18
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130563-203045

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-URI http://asc.fasb.org/topic&trid=49130388

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 20
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130566-203045

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 18
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130563-203045

Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=84158767&loc=d3e18823-107790

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 20
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130566-203045

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 19
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130564-203045

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 20
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130566-203045

+ Details

Summary of Significant Accounting Policies (Tables)

3 Months Ended

Jun. 30, 2020

Accounting Policies [Abstract]

Schedule of Antidilutive Securities Excluded from Computation of Diluted Net Loss Per Common Share

As of June 30, 2020 and 2019, potentially dilutive securities were as follows:


	June 30,
	2020	2019
Stock options	8,648,078	7,085,337
Restricted stock awards (unvested)	564,111	846,165
Restricted stock units (unvested)	2,771,770	38,449
Performance stock units (unvested)	831,431	—
Warrants	73,710	73,710
Total	12,889,100	8,043,661

Schedule of Cash, Cash Equivalents and Restricted Cash


	June 30,
	2020		2019
Cash and cash equivalents	$	84,726	$	226,734
Restricted cash ⁽¹⁾	1,374		1,125
Total cash, cash equivalents and restricted cash	$	86,100	$	227,859

⁽¹⁾ Included in other assets on the unaudited condensed consolidated balance sheets.

Investments and Fair Value Measurements (Tables)

3 Months Ended

Jun. 30, 2020

Fair Value Disclosures [Abstract]

Assets Measured at Fair Value

The following table summarizes the Company’s assets that require fair value measurements on a recurring basis and their respective input levels based on the fair value hierarchy (in thousands):


	Quoted Market Prices for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Fair Value
As of June 30, 2020
Money market funds ⁽¹⁾	$	4,988	$	—	$	—	$	4,988
Commercial paper ⁽²⁾	—		48,382		—		48,382
Municipal bonds⁽³⁾	—		16,617		—		16,617
Total assets	$	4,988	$	64,999	$	—	$	69,987

As of March 31, 2020
Money market funds ⁽¹⁾	$	11,348	$	—	$	—	$	11,348
Commercial paper⁽⁴⁾	—		7,042		—		7,042
Total assets	$	11,348	$	7,042	$	—	$	18,390

⁽¹⁾ Included in cash and cash equivalents.

⁽²⁾ Includes $41.6 million in cash and cash equivalents and $6.8 million in marketable securities.

⁽³⁾ Includes $8.4 million in cash and cash equivalents and $8.2 million in marketable securities.

⁽⁴⁾ Includes $4.0 million in cash and cash equivalents and $3.0 million in marketable securities.

Accrued Expenses (Tables)

3 Months Ended

Jun. 30, 2020

Payables and Accruals [Abstract]

Schedule of Accrued Liabilities

As of June 30, 2020, and March 31, 2020, accrued expenses consisted of the following (in thousands):


	June 30, 2020		March 31, 2020
Accrued R&D expenses	$	15,437	$	15,500
Accrued compensation-related expenses	6,994		9,309
Accrued commercial expenses	3,190		818
Accrued professional service fees	763		1,126
Accrued other expenses	2,536		2,307
Total accrued expenses	$	28,920	$	29,060

Share-Based Compensation (Tables)

3 Months Ended

Jun. 30, 2020

Share-based Payment Arrangement [Abstract]

Summary of Stock Option Activity

A summary of stock option activity under the Company’s 2016 Plan is as follows:


			Number of Options
Options outstanding at March 31, 2020			7,723,302
Granted			1,571,323
Exercised			(302,076)
Forfeited			(344,471)

Options outstanding at June 30, 2020			8,648,078
Options vested and expected to vest at June 30, 2020			8,648,078

Options exercisable at June 30, 2020			3,236,128

Summary of Restricted Share Awards and Restricted Stock Units Activity

A summary of restricted stock award and restricted stock unit activity under the Company’s 2016 Plan is as follows:


			Number of Shares
Unvested balance at March 31, 2020			1,280,312
Granted			2,298,339
Vested			(71,450)
Forfeited			(171,320)
Unvested balance at June 30, 2020			3,335,881

Share-based Payment Arrangement, Performance Shares, Activity

A summary of performance stock unit activity under the Company's 2016 Plan is as follows:


			Number of Shares
Unvested balance at March 31, 2020			299,870
Granted			568,976
Vested			—
Forfeited			(37,415)
Unvested balance at June 30, 2020			831,431

Schedule of Share-based Compensation

Share-based compensation expense was as follows (in thousands):


	Three Months Ended June 30,
	2020		2019
Share-based compensation expense recognized as:
R&D expenses	$	4,024	$	2,548
G&A expenses	3,788		3,904
Total	$	7,812	$	6,452

Leases (Tables)

3 Months Ended

Jun. 30, 2020

Leases [Abstract]

Operating Lease Expense

The components of operating lease expense for the Company’s office space were as follows (in thousands):


	Three Months Ended June 30,
	2020		2019
Operating lease cost	$	729	$	519

Variable lease cost ⁽¹⁾	90		9
Total operating lease cost	$	819	$	528

⁽¹⁾ Variable lease cost includes common area maintenance and utilities costs which are not included in operating lease liabilities and which are expensed as incurred.

Certain information related to the Company’s operating lease right-of-use assets and operating lease liabilities for its Brisbane, California office space are as follows (in thousands):


	Three Months Ended June 30,
	2020		2019
Cash paid for operating lease liabilities	$	729	$	496
Operating lease right-of-use assets obtained in exchange for new operating lease liabilities	$	—	$	9,181

Maturities of Operating Lease Liabilities

As of June 30, 2020, maturities of operating lease liabilities were as follows (in thousands):


Years Ended March 31,
2021 (remainder of year)	$	2,210
2022	3,028
2023	3,127
2024	3,053
2025	2,409
Thereafter	2,898
Total lease payments	16,725
Less imputed interest	(4,569)
Present value of future minimum lease payments	12,156
Less operating lease liability, current portion	(1,585)
Operating lease liability, long-term portion	$	10,571

Commitment and Contingencies (Tables)

3 Months Ended

Jun. 30, 2020

Commitments and Contingencies Disclosure [Abstract]

Contract Liabilities

The following table presents changes in the Company’s total contract liabilities during the three months ended June 30, 2020 (in thousands):


	Balance at						Balance at
	March 31, 2020		Additions		Deductions		June 30, 2020

Contract liabilities:
Deferred revenue, current	$	40,000	$	10,000	$	(33,333)	$	16,667

Description of Business (Details) - Majority Shareholder - Sumitomo Dainippon Pharma Co., Ltd. - shares	Jun. 30, 2020	Dec. 27, 2019
Noncontrolling Interest [Line Items]
Number of shares issued (in shares)	48,641,181	45,008,604
Ownership percentage	54.00%	50.20%

Summary of Significant Accounting Policies - Narrative (Details) $ in Thousands		3 Months Ended
	Aug. 03, 2020	Jun. 30, 2020 USD ($) segment	Jun. 30, 2019 USD ($)
Accounting Policies [Abstract]
Number of operating segments \| segment		1
Number of reporting segments \| segment		1
Net loss \| $		$ 32,860	$ 67,904
Cash and cash equivalents used in operations \| $		$ 61,984	$ 66,811
Sumitomo Dainippon Pharma Co., Ltd. \| New Letter Agreement with Sumitomo Dainippon Pharma, Co., Ltd. \| Term Loan \| Majority Shareholder \| Subsequent Event
Debt Instrument [Line Items]
Facility term	5 years

Summary of Significant Accounting Policies - Schedule of Antidilutive Securities (Details) - shares	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	12,889,100	8,043,661
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	8,648,078	7,085,337
Restricted stock awards (unvested)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	564,111	846,165
Restricted stock units (unvested)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	2,771,770	38,449
Performance stock units (unvested)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	831,431	0
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	73,710	73,710

Summary of Significant Accounting Policies - Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019
Accounting Policies [Abstract]
Cash and cash equivalents	$ 84,726	$ 76,644	$ 226,734
Restricted cash	1,374		1,125
Total cash, cash equivalents and restricted cash	$ 86,100	$ 78,018	$ 227,859	$ 157,199

Investments and Fair Value Measurements (Details) - USD ($)	Jun. 30, 2020	Mar. 31, 2020
Fair Value Disclosures [Abstract]
Marketable securities	$ 14,970,000	$ 2,997,000
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	69,987,000	18,390,000
Total liabilities	0	0
Money Market Funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	4,988,000	11,348,000
Commercial Paper
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	48,382,000	7,042,000
Cash and cash equivalents	41,600,000	4,000,000.0
Marketable securities	6,800,000	3,000,000.0
Municipal Bonds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	16,617,000
Cash and cash equivalents	8,400,000
Marketable securities	8,200,000
Quoted Market Prices for Identical Assets (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	4,988,000	11,348,000
Quoted Market Prices for Identical Assets (Level 1) \| Money Market Funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	4,988,000	11,348,000
Quoted Market Prices for Identical Assets (Level 1) \| Commercial Paper
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	0	0
Quoted Market Prices for Identical Assets (Level 1) \| Municipal Bonds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	0
Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	64,999,000	7,042,000
Significant Other Observable Inputs (Level 2) \| Money Market Funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	0	0
Significant Other Observable Inputs (Level 2) \| Commercial Paper
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	48,382,000	7,042,000
Significant Other Observable Inputs (Level 2) \| Municipal Bonds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	16,617,000
Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	0	0
Significant Unobservable Inputs (Level 3) \| Money Market Funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	0	0
Significant Unobservable Inputs (Level 3) \| Commercial Paper
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	0	$ 0
Significant Unobservable Inputs (Level 3) \| Municipal Bonds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	$ 0

Accrued Expenses (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020
Payables and Accruals [Abstract]
Accrued R&D expenses	$ 15,437	$ 15,500
Accrued compensation-related expenses	6,994	9,309
Accrued commercial expenses	3,190	818
Accrued professional service fees	763	1,126
Accrued other expenses	2,536	2,307
Total accrued expenses	$ 28,920	$ 29,060

Related Party Transactions (Narrative) (Details)						3 Months Ended
Related Party Transactions (Narrative) (Details)	Aug. 03, 2020	May 18, 2020 USD ($)	Dec. 30, 2019 USD ($)	Dec. 27, 2019 USD ($) day director shares	Jun. 04, 2019 USD ($) $ / shares shares	Jun. 30, 2020 USD ($) shares	Jun. 30, 2019 USD ($)	Aug. 05, 2020 USD ($)
Related Party Transaction [Line Items]
Proceeds from related party debt financing						$ 80,000,000	$ 0
Interest expense (related party)						$ 2,184,000	0
Sumitomo Dainippon Pharma Co., Ltd. \| Majority Shareholder
Related Party Transaction [Line Items]
Number of shares owned (in shares) \| shares				45,008,604		48,641,181
Ownership percentage				50.20%		54.00%
Ownership threshold for appointment of directors				50.00%
Number of independing directors required for audit commitee \| director				3
Ownership threshold for voting rights				60.00%
Ownership threshold for right of ownership percentage maintenance				50.00%
Sumitomo Dainippon Pharma Co., Ltd. \| Majority Shareholder \| Sumitovant Consulting Agreement
Related Party Transaction [Line Items]
Termination notice period		15 days
Maximum fees		$ 120,000
Expenses incurred under agreements						$ 114,000
Roivant Sciences, Ltd. \| Majority Shareholder \| Service Agreement
Related Party Transaction [Line Items]
Expenses incurred under agreements							200,000
Roivant Sciences, Ltd. \| Majority Shareholder \| Share-based Compensation, Expense Allocated to Company
Related Party Transaction [Line Items]
Expenses incurred under agreements						0	100,000
Public Offering
Related Party Transaction [Line Items]
Number of shares issued (in shares) \| shares					17,424,243
Price of shares (in USD per share) \| $ / shares					$ 8.25
Net proceeds from sale of shares					$ 134,500,000
Public Offering \| Roivant Sciences, Ltd. \| Majority Shareholder
Related Party Transaction [Line Items]
Number of shares issued (in shares) \| shares					2,424,242
Price of shares (in USD per share) \| $ / shares					$ 8.25
Net proceeds from sale of shares					$ 20,000,000.0
Term Loan \| Letter Agreement with Sumitomo Dainippon Pharma, Co., Ltd. \| Sumitomo Dainippon Pharma Co., Ltd. \| Majority Shareholder
Related Party Transaction [Line Items]
Maximum borrowing commitment				$ 400,000,000.0
Proceeds from related party debt financing			$ 113,700,000
Facility term				5 years
Notice period for prepayment \| day				10
Default interest rate				5.00%
Repayment period upon change in control				30 days
Outstanding balance						193,700,000
Available borrowing capacity						206,300,000
Interest expense (related party)						$ 2,200,000	$ 0
Term Loan \| New Letter Agreement with Sumitomo Dainippon Pharma, Co., Ltd. \| Sumitomo Dainippon Pharma Co., Ltd. \| Majority Shareholder \| Subsequent Event
Related Party Transaction [Line Items]
Maximum borrowing commitment								$ 200,000,000.0
Facility term	5 years
LIBOR \| Term Loan \| Letter Agreement with Sumitomo Dainippon Pharma, Co., Ltd. \| Sumitomo Dainippon Pharma Co., Ltd. \| Majority Shareholder
Related Party Transaction [Line Items]
Variable interest rate				3.00%

Income Taxes - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
Income Taxes - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Effective income tax rate	(2.09%)	(0.46%)
Deferred employer payroll taxes	$ 0.8

Shareholders' Deficit - Narrative (Details) - USD ($)		3 Months Ended
Shareholders' Deficit - Narrative (Details) - USD ($)	Jun. 04, 2019	Jun. 30, 2019	Jun. 30, 2020	Apr. 30, 2018
Public Offering
Subsidiary, Sale of Stock [Line Items]
Number of shares issued (in shares)	17,424,243
Price of shares (in USD per share)	$ 8.25
Net proceeds from sale of shares	$ 134,500,000
Cowen and Company, LLC \| Private Placement
Subsidiary, Sale of Stock [Line Items]
Aggregate offering price				$ 100,000,000.0
Number of shares issued (in shares)		106,494
Price of shares (in USD per share)		$ 24.65
Net proceeds from sale of shares		$ 2,500,000
Remaining capacity in offering program			$ 10,400,000

Share-Based Compensation (Narrative) (Details) - USD ($) shares in Millions, $ in Millions		3 Months Ended
	Apr. 01, 2020	Jun. 30, 2020	Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost		$ 69.3
Unrecognized compensation expense, period for recognition		3 years
Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment arrangement, expensed and capitalized, amount		$ 0.6
Myovant 2016 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for grant (in shares)		1.2	4.5
Common shares reserved for grant, annual percentage increase			4.00%
Increase in common shares reserved for grant (in shares)	3.6

Share-Based Compensation (Summary of Stock Option Activity) (Details)	3 Months Ended
	Jun. 30, 2020 shares
Number of Options
Beginning balance (in shares)	7,723,302
Granted (in shares)	1,571,323
Exercised (in shares)	(302,076)
Forfeited (in shares)	(344,471)
Ending balance (in shares)	8,648,078
Options vested and expected to vest (in shares)	8,648,078
Options exercisable (in shares)	3,236,128

Share-Based Compensation (Restricted Share Awards and Restricted Stock Units) (Details) - Restricted Share Awards and Restricted Stock Units	3 Months Ended
	Jun. 30, 2020 shares
Number of Shares
Beginning balance (in shares)	1,280,312
Granted (in shares)	2,298,339
Vested (in shares)	(71,450)
Forfeited (in shares)	(171,320)
Ending balance (in shares)	3,335,881

Share-Based Compensation (Performance Stock Units) (Details) - Performance Stock Units	3 Months Ended
	Jun. 30, 2020 shares
Number of Shares
Beginning balance (in shares)	299,870
Granted (in shares)	568,976
Vested (in shares)	0
Forfeited (in shares)	(37,415)
Ending balance (in shares)	831,431

Share-Based Compensation (Share-Based Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation	$ 7,812	$ 6,452
R&D expenses
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation	4,024	2,548
G&A expenses
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation	$ 3,788	$ 3,904

Leases - Operating Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Operating lease cost	$ 729	$ 519
Variable lease cost	90	9
Total operating lease cost	$ 819	$ 528

Leases - Operating Lease Right of Use Assets and Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Cash paid for operating lease liabilities	$ 729	$ 496
Operating lease right-of-use assets obtained in exchange for new operating lease liabilities	$ 0	$ 9,181

Leases - Narrative (Details) - Brisbane, California Office Space	Jun. 30, 2020
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term	5 years 4 months 24 days
Weighted average discount rate	12.30%

Leases - Operating Lease Liability Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020
Leases [Abstract]
2021 (remainder of year)	$ 2,210
2022	3,028
2023	3,127
2024	3,053
2025	2,409
Thereafter	2,898
Total lease payments	16,725
Less imputed interest	(4,569)
Present value of future minimum lease payments	12,156
Less operating lease liability, current portion	(1,585)	$ (1,516)
Operating lease liability, long-term portion	$ 10,571	$ 10,996

Development and Commercialization Agreement (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Apr. 30, 2020	Jun. 30, 2020	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Upfront payment received included in current deferred revenue			$ 40,000
Maximum payment from regulatory milestones achieved			40,000
Maximum payment from sales-related milestones achieved			107,500
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining transaction price			$ 50,000
Change in contract liability		$ (23,333)
Decrease in contract liability from regulatory milestones achieved		33,333
Increase in contract liability from regulatory milestones achieved	$ 10,000	10,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining transaction price		$ 16,700
Recognition period for remaining transaction price		9 months

Development and Commercialization Agreement - Contract Liabilities (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Apr. 30, 2020	Jun. 30, 2020
Change in Contract with Customer, Liability [Roll Forward]
Beginning balance	$ 40,000	$ 40,000
Additions	$ 10,000	10,000
Deductions		(33,333)
Ending balance		$ 16,667

Commitments and Contingencies - Narrative (Details) - Takeda Commercial Supply Agreement	3 Months Ended
	Jun. 30, 2020
Supply Commitment [Line Items]
Agreement term after first commercial sale	10 years
Agreement term	5 years
Automatic renewal term	1 year
Termination notice term	12 months
Termination notice term, uncured material breach	90 days
Termination notice term, open purchase orders filed	180 days

Subsequent Events (Details) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended
Subsequent Events (Details) - USD ($) $ in Thousands	Aug. 01, 2020	Jul. 31, 2020	Jun. 30, 2020	Jun. 30, 2019
Subsequent Event [Line Items]
Proceeds from related party debt financing			$ 80,000	$ 0
Sumitomo Dainippon Pharma Co., Ltd. \| Letter Agreement with Sumitomo Dainippon Pharma, Co., Ltd. \| Term Loan \| Majority Shareholder \| Subsequent Event
Subsequent Event [Line Items]
Proceeds from related party debt financing		$ 60,000
Available borrowing capacity		$ 146,300
Sunovion Pharmaceuticals Inc. [Member] \| Majority Shareholder \| Subsequent Event
Subsequent Event [Line Items]
Agreement term	3 years
Agreement extension term	1 year
Agreement termination notice term	9 months