Revenue by Product - Summary of Revenue (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) segment	Sep. 30, 2019 USD ($)
Segment Reporting [Abstract]
Number of operating segments (in segments) | segment			1
Segment Reporting Information [Line Items]
Total revenues	$ 0	$ 14,229	$ 22,334	$ 48,220
Bloxiverz
Segment Reporting Information [Line Items]
Total revenues	0	1,466	2,201	6,392
Vazculep
Segment Reporting Information [Line Items]
Total revenues	0	8,786	10,429	27,669
Akovaz
Segment Reporting Information [Line Items]
Total revenues	0	4,208	9,545	13,946
Other
Segment Reporting Information [Line Items]
Total revenues	$ 0	$ (231)	$ 159	$ 213