Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Contingent Consideration (Details)

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Commitments and Contingencies - Contingent Consideration (Details) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Sep. 30, 2019
Dec. 31, 2020
Dec. 31, 2019
Apr. 07, 2019
Feb. 25, 2019
Commitments And Contingencies          
Contingent consideration under royalty purchase agreements   $ 75 $ 75    
Royalty Purchase Agreement | Bioasis Technologies Inc          
Commitments And Contingencies          
Contingent consideration under royalty purchase agreements   100     $ 100
Payments of contingent consideration   0      
Changes in estimated fair value of contingent consideration   0 $ 0    
Royalty Purchase Agreement | Aronora          
Commitments And Contingencies          
Contingent consideration under royalty purchase agreements   $ 0   $ 3,000  
Payments of contingent consideration $ 3,000