Debt - Schedule of Total Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Mar. 31, 2022	May 26, 2021
Debt Instrument [Line Items]
Secured Notes	$ 132,917	$ 132,917
Carrying value Secured Notes	116,752	116,385
Royalty liability	24,938	40,076
Convertible Notes	105,000	105,000
Carrying value Convertible Notes	79,590	76,852
Total Debt	221,280	233,313
Secured Notes [Member]
Debt Instrument [Line Items]
Debt discount, net of amortization	(13,927)	(13,854)
Deferred debt costs, net of amortization	(2,238)	(2,678)
Convertible Notes [Member]
Debt Instrument [Line Items]
Debt discount, net of amortization	(22,571)	(24,968)
Deferred debt costs, net of amortization	$ (2,839)	$ (3,180)	$ (3,700)