Commitment and Contingencies - Narrative (Details) $ in Millions	1 Months Ended
	Jul. 31, 2020 USD ($)
Schedule Of Asset Acquisition [Line Items]
Royalty obligation, termination, period from first commercial sale	10 years
Asset Purchase Agreement
Schedule Of Asset Acquisition [Line Items]
Sales milestone payment	$ 29.0
Regulatory milestone payment	51.3
Aggregate sales milestone payment	115.0
Gilead Asset Purchase
Schedule Of Asset Acquisition [Line Items]
Upfront cash payment	3.0
Convertible promissory note issued	3.0
Payments for reimbursements	$ 0.7