Annual report pursuant to Section 13 and 15(d)

Royalty Purchase Agreements - Palobiofarrma (Details)

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Royalty Purchase Agreements - Palobiofarrma (Details)
12 Months Ended
Sep. 26, 2019
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Agreements      
Payments to acquire milestones and royalties   $ 19,300,000 $ 15,000,000
Proceeds from issuance of long-term debt   9,500,000 7,500,000
Long-term royalty receivables   34,375,000 15,000,000
Impairment of long-term royalty receivable   0 $ 0
Royalty Purchase Agreement | Palobiofarma, S.L.      
Agreements      
Number of drug candidates 6    
Payments to acquire milestones and royalties $ 10,000,000    
Long-term royalty receivables 10,000,000    
Impairment of long-term royalty receivable   $ 0  
Royalty Purchase Agreement | Palobiofarma, S.L. | Silicon Valley Bank Loan Agreement      
Agreements      
Proceeds from issuance of long-term debt $ 5,000,000