Revenue by Product - Summary of Revenue (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) segment	Jun. 30, 2020 USD ($)
Segment Reporting [Abstract]
Number of operating segments | segment			1
Segment Reporting Information [Line Items]
Product sales	$ 0	$ 10,091	$ 0	$ 22,334
Bloxiverz
Segment Reporting Information [Line Items]
Product sales		800		2,201
Vazculep
Segment Reporting Information [Line Items]
Product sales		4,915		10,429
Akovaz
Segment Reporting Information [Line Items]
Product sales		4,196		9,545
Other
Segment Reporting Information [Line Items]
Product sales		$ 180		$ 159