Revenue Components - Narrative (Details) - USD ($)		3 Months Ended		6 Months Ended
	Mar. 30, 2020	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Jul. 31, 2021	Dec. 26, 2020
Richter
Disaggregation of Revenue [Line Items]
Maximum payment from regulatory milestones achieved	$ 40,000,000
Regulatory milestone payments received	$ 25,300,000		$ 15,000,000		$ 15,000,000
Pfizer
Disaggregation of Revenue [Line Items]
Maximum payment from regulatory milestones achieved						$ 100,000,000	$ 100,000,000
Richter product supply and royalties
Disaggregation of Revenue [Line Items]
Revenues		$ 225,000	1,771,000	$ 1,543,000	1,771,000
RYEQO Royalties
Disaggregation of Revenue [Line Items]
Revenues		200,000	100,000	400,000	100,000
Richter Product Supply
Disaggregation of Revenue [Line Items]
Revenues		0	1,700,000	1,100,000	1,700,000
Accord license revenue
Disaggregation of Revenue [Line Items]
Revenues		0	0	50,000,000	0
Revenue Recognized Upon Completion of Delivery | Richter
Disaggregation of Revenue [Line Items]
Revenues		300,000	16,700,000	300,000	16,700,000
Richter license and milestone revenue
Disaggregation of Revenue [Line Items]
Revenues		$ 300,000	$ 31,667,000	$ 300,000	$ 31,667,000