Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions	9 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Mar. 31, 2022	Jul. 31, 2021	Nov. 12, 2020	Feb. 29, 2020
Stockholders' Equity
Common shares authorized (in shares)	1,000,000,000		1,000,000,000		1,010,000,000
Common shares issued (in shares)	73,975,196		73,739,378		1,000,000,000
Common shares par value (in dollars per share)	$ 0.00001		$ 0.00001		$ 0.00001
Preferred stock shares authorized (in shares)					10,000,000
Preferred Stock shares par value (in dollars per share)					$ 0.00001
Stock Offering
Stockholders' Equity
Number of securities called by warrants (in shares)				3,301,998		3,301,998
Warrants issued (in dollars per share)						$ 3.74999
Exercise price (in dollars per share)						$ 0.00001
Private Placement | SVB Leerink LLC
Stockholders' Equity
Percentage of gross proceeds from common stock issuance paid for services (as a percent)						3.00%
Shares sold in common stock issuance (in shares)	30,400,000	700,000
Net proceeds from common stock issued	$ 92.0	$ 1.6