Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Assets and Liabilities at Fair Value (Details)

v3.20.1
Fair Value Measurements - Assets and Liabilities at Fair Value (Details) - USD ($)
3 Months Ended
Sep. 30, 2019
Mar. 31, 2020
Dec. 31, 2019
Assets:      
Short-term investments   $ 621,284,000 $ 939,989,000
Investment in Viking common stock   28,258,000 48,425,000
Investment in warrants   4,621,000 9,910,000
Total assets   654,163,000 998,324,000
Liabilities:      
Amounts owed to former licensor   77,000 75,000
Total liabilities   6,759,000 9,017,000
Repayments of related party debt $ 1,800,000    
Transferred over Time | Phase 3 Clinical Trial      
Liabilities:      
Contract asset   10,000,000  
Maximum | Transferred over Time | Development, Regulatory, & Commercial Milestones and Tiered Royalties      
Liabilities:      
Investments   375,000,000  
Crystal      
Liabilities:      
Contingent liabilities   859,000 2,659,000
CyDex      
Liabilities:      
Contingent liabilities   413,000 348,000
Metabasis      
Liabilities:      
Contingent liabilities   5,410,000 5,935,000
Level 1      
Assets:      
Short-term investments   1,453,000 3,073,000
Investment in Viking common stock   28,258,000 48,425,000
Investment in warrants   4,621,000 9,910,000
Total assets   34,332,000 61,408,000
Liabilities:      
Amounts owed to former licensor   77,000 75,000
Total liabilities   77,000 75,000
Level 1 | Crystal      
Liabilities:      
Contingent liabilities   0 0
Level 1 | CyDex      
Liabilities:      
Contingent liabilities   0 0
Level 1 | Metabasis      
Liabilities:      
Contingent liabilities   0 0
Level 2      
Assets:      
Short-term investments   619,773,000 936,791,000
Investment in Viking common stock   0 0
Investment in warrants   0 0
Total assets   619,773,000 936,791,000
Liabilities:      
Amounts owed to former licensor   0 0
Total liabilities   5,410,000 5,935,000
Level 2 | Crystal      
Liabilities:      
Contingent liabilities   0 0
Level 2 | CyDex      
Liabilities:      
Contingent liabilities   0 0
Level 2 | Metabasis      
Liabilities:      
Contingent liabilities   5,410,000 5,935,000
Level 3      
Assets:      
Short-term investments   58,000 125,000
Investment in Viking common stock   0 0
Investment in warrants   0 0
Total assets   58,000 125,000
Liabilities:      
Amounts owed to former licensor   0 0
Total liabilities   1,272,000 3,007,000
Level 3 | Crystal      
Liabilities:      
Contingent liabilities   859,000 2,659,000
Level 3 | CyDex      
Liabilities:      
Contingent liabilities   413,000 348,000
Level 3 | Metabasis      
Liabilities:      
Contingent liabilities   $ 0 $ 0