Product Sales - Schedule of Concentration of Risk, by Risk Factor (Details) - Gross product revenue - Customer concentration risk	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Besse Medical, a subsidiary of AmerisourceBergen Corporation
Concentration Risk [Line Items]
Concentration risk, percentage	22.00%	53.00%	30.00%	53.00%
McKesson Corporation
Concentration Risk [Line Items]
Concentration risk, percentage	14.00%	32.00%	19.00%	34.00%
U.S. Government
Concentration Risk [Line Items]
Concentration risk, percentage	57.00%	0.00%	43.00%	0.00%