Revenue by Product - Summary of Revenue (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) segment	Mar. 31, 2020 USD ($)
Segment Reporting [Abstract]
Number of operating segments (in segments) | segment	1
Segment Reporting Information [Line Items]
Product sales	$ 0	$ 12,243
Bloxiverz
Segment Reporting Information [Line Items]
Product sales	0	1,401
Vazculep
Segment Reporting Information [Line Items]
Product sales	0	5,514
Akovaz
Segment Reporting Information [Line Items]
Product sales	0	5,349
Other
Segment Reporting Information [Line Items]
Product sales	$ 0	$ (21)