Consolidated Statements of Shareholders' Deficit - USD ($) $ in Thousands	Total	Common Shares	Additional Paid-in Capital	Accumulated Other Comprehensive (Income) Loss	Accumulated Deficit	Private Placement	Private Placement Common Shares	Private Placement Additional Paid-in Capital	Public Offering	Public Offering Common Shares	Public Offering 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]
Shares issued (in shares)							106,494			17,424,243
Shares issued						$ 2,546		$ 2,546	$ 134,458	$ 1	$ 134,457
Share-based compensation	40,102		40,102
Capital contribution from former majority shareholder — share-based compensation	149		149
Capital contribution from former majority shareholder	334		334
Issuance of shares upon exercise of stock options (in shares)		245,771
Issuance of shares upon exercise of stock options and release of share awards	942		942
Foreign currency translation adjustment	(2,153)			(2,153)
Net loss	(288,989)				(288,989)
Ending balance (in shares) at Mar. 31, 2020		89,833,998
Ending balance at Mar. 31, 2020	(108,277)	$ 2	684,381	(1,646)	(791,014)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	53,676		53,676
Share-based compensation awards reclassified to current liabilities	(17,473)		(17,473)
Share-based compensation liabilities reclassified to equity upon settlement of awards	6,446		6,446
Share-based compensation reclassified to current liabilities	(10,609)		(10,609)
Issuance of shares upon release of share awards, net of shares withheld for taxes (in shares)		261,095
Issuance of shares upon release of share awards, net of shares withheld for taxes	(13,664)
Issuance of shares upon exercise of stock options (in shares)		905,776
Issuance of shares upon exercise of stock options and release of share awards	6,709		6,709
Foreign currency translation adjustment	(15,639)			(15,639)
Net loss	$ (255,134)				(255,134)
Ending balance (in shares) at Mar. 31, 2021	91,000,869	91,000,869
Ending balance at Mar. 31, 2021	$ (353,965)	$ 2	709,466	(17,285)	(1,046,148)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	38,928		38,928
Share-based compensation liabilities reclassified to equity upon settlement of awards	23,335		23,335
Share-based compensation reclassified to current liabilities	$ (1,699)		(1,699)
Issuance of shares upon exercise of stock options (in shares)	2,513,887	3,857,577
Issuance of shares upon exercise of stock options and release of share awards	$ 24,625		24,625
Foreign currency translation adjustment	0
Capital contribution - other	1,280		1,280
Net loss	$ (205,981)				(205,981)
Ending balance (in shares) at Mar. 31, 2022	94,858,446	94,858,446
Ending balance at Mar. 31, 2022	$ (473,477)	$ 2	$ 795,935	$ (17,285)	$ (1,252,129)