Condensed Consolidated Statements of Shareholders' Deficit - USD ($) $ in Thousands	Total	Common Shares	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Beginning balance (in shares) at Mar. 31, 2021		91,000,869
Beginning 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 expense	11,262		11,262
Share-based compensation liabilities reclassified to equity upon settlement of awards	1,862		1,862
Share-based compensation reclassified to current liabilities	(1,377)		(1,377)
Issuance of shares upon exercise of stock options and release of share awards (in shares)		941,774
Issuance of shares upon exercise of stock options and release of share awards	4,252		4,252
Net loss	(61,660)				(61,660)
Ending balance (in shares) at Jun. 30, 2021		91,942,643
Ending balance at Jun. 30, 2021	$ (399,626)	$ 2	725,465	(17,285)	(1,107,808)
Beginning balance (in shares) at Mar. 31, 2022	94,858,446	94,858,446
Beginning balance at Mar. 31, 2022	$ (473,477)	$ 2	795,935	(17,285)	(1,252,129)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	$ 10,001		10,001
Issuance of shares upon exercise of stock options and release of share awards (in shares)	164,226	798,586
Issuance of shares upon exercise of stock options and release of share awards	$ 1,191		1,191
Net loss	$ (21,239)				(21,239)
Ending balance (in shares) at Jun. 30, 2022	95,657,032	95,657,032
Ending balance at Jun. 30, 2022	$ (483,524)	$ 2	$ 807,127	$ (17,285)	$ (1,273,368)