Revenue Components - Narrative (Details) - USD ($) $ in Thousands			3 Months Ended		9 Months Ended
	Jul. 16, 2021	Mar. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Pfizer collaboration revenue			$ 25,172	$ 1,379	$ 79,853	$ 1,379
Richter
Disaggregation of Revenue [Line Items]
Regulatory milestone payments received	$ 15,000	$ 25,000
Richter product supply and royalties
Disaggregation of Revenue [Line Items]
Revenues			2,446	0	4,217	0
Richter product supply and royalties | Richter
Disaggregation of Revenue [Line Items]
Revenues			2,300		4,100
RYEQO | Richter | Maximum
Disaggregation of Revenue [Line Items]
Revenues			100		200
Richter license and milestone revenue
Disaggregation of Revenue [Line Items]
Revenues			0	$ 0	31,667	33,333
Revenue Recognized Upon Completion of Delivery | Richter
Disaggregation of Revenue [Line Items]
Revenues			$ 16,700		$ 16,700	$ 33,300