Capital Stock - Schedule of Common Stock Reserved for Future Issuance (Details) - shares	Mar. 31, 2026	Mar. 31, 2025
Common stock reserved for future issuance (in shares)	67,728,292	78,097,336
Common stock authorized but not reserved (in shares)	217,605,705
Issuance of common stock upon exercise of outstanding stock options under the Amended and Restated 2016 Stock Incentive Plan and the Amended and Restated 2019 Omnibus Equity Incentive Plan and inducement awards granted outside of the 2019 Plan
Common stock reserved for future issuance (in shares)	4,457,368	3,239,642
Equity awards available under the Amended and Restated 2019 Omnibus Equity Incentive Plan
Common stock reserved for future issuance (in shares)	1,122,097	2,042,153
Shares available for issuance under the 2019 Employee Stock Purchase Plan
Common stock reserved for future issuance (in shares)	693,558	911,342
Shares reserved under the Sales Agreement
Common stock reserved for future issuance (in shares)	17,548,172	27,951,416
Warrant
Common stock reserved for future issuance (in shares)	43,907,097	43,952,783