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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)