Revenue Components - Narrative (Details) - USD ($)			3 Months Ended	12 Months Ended
	Jul. 16, 2021	Mar. 30, 2020	Mar. 31, 2022	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Pfizer collaboration revenue				$ 104,996,000	$ 22,354,000	$ 0
Richter
Disaggregation of Revenue [Line Items]
Regulatory milestone payments received	$ 15,000,000	$ 25,000,000		15,000,000
ORGOVYX
Disaggregation of Revenue [Line Items]
Revenues				82,959,000	3,630,000	0
MYFEMBREE
Disaggregation of Revenue [Line Items]
Revenues				6,355,000	0	0
Richter product supply and royalties
Disaggregation of Revenue [Line Items]
Revenues				4,995,000	0	0
Richter product supply and royalties | Richter
Disaggregation of Revenue [Line Items]
Revenues				4,700,000
RYEQO | Richter | Maximum
Disaggregation of Revenue [Line Items]
Revenues				300,000
Richter license and milestone revenue
Disaggregation of Revenue [Line Items]
Revenues				31,667,000	33,333,000	$ 0
Revenue Recognized Upon Completion of Delivery | Richter
Disaggregation of Revenue [Line Items]
Revenues			$ 16,700,000	$ 16,700,000	$ 33,300,000