Quarterly report pursuant to Section 13 or 15(d)

Royalty Purchase Agreements - Bioasis (Details)

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Royalty Purchase Agreements - Bioasis (Details)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Feb. 25, 2019
USD ($)
agreement
Jun. 30, 2020
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
Agreements          
Payments to acquire milestones and royalties       $ 6,300  
Contingent consideration under royalty purchase agreements   $ 75 $ 75   $ 75 [1]
Long-term royalty receivables   34,375 34,375   34,375 [1]
Changes in estimated fair value of contingent consideration     0    
Payments of contingent consideration   $ 0 0    
Impairment of long-term royalty receivable     0   $ 0
Bioasis Technologies Inc | Royalty Purchase Agreement          
Agreements          
Percentage of option to purchase royalty right on future license agreements 1.00%        
Number of future license agreements under optional purchase right | agreement 2        
Obligation upon exercise of options per licensed product, second agreement $ 300        
Obligation upon exercise of options per licensed product, third agreement 400        
Payments to acquire milestones and royalties 300        
Long-term royalty receivables 400        
Estimated fair value of contingent consideration 100        
Impairment of long-term royalty receivable     $ 0    
Bioasis Technologies Inc | Royalty Purchase Agreement | Maximum          
Agreements          
Potential future cash payments $ 200        
[1] The consolidated balance sheet as of December 31, 2019 has been derived from the audited consolidated financial statements as of that date included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019.