Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.3
Fair Value Measurements - Assets and Liabilities at Fair Value (Details) - USD ($)
3 Months Ended
Sep. 30, 2019
Mar. 31, 2018
Dec. 31, 2018
Assets:      
Short-term investments $ 874,383,000   $ 601,217,000
Investment in Viking common stock 41,542,000   46,191,000
Investment in warrants 8,314,000   9,257,000
Total assets 924,239,000   656,665,000
Liabilities:      
Amounts owed to former licensor 61,000   199,000
Total liabilities 9,850,000   12,741,000
Repayments of related party debt 3,000,000.0 $ 1,000,000.0  
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 1,826,000   6,477,000
CyDex      
Liabilities:      
Contingent liabilities 465,000   514,000
Metabasis      
Liabilities:      
Contingent liabilities 7,498,000   5,551,000
Level 1      
Assets:      
Short-term investments 2,171,000   1,326,000
Investment in Viking common stock 41,542,000   46,191,000
Investment in warrants 8,314,000   9,257,000
Total assets 52,027,000   56,774,000
Liabilities:      
Amounts owed to former licensor 61,000   199,000
Total liabilities 61,000   199,000
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 872,147,000   599,891,000
Investment in Viking common stock 0   0
Investment in warrants 0   0
Total assets 872,147,000   599,891,000
Liabilities:      
Amounts owed to former licensor 0   0
Total liabilities 7,498,000   5,551,000
Level 2 | Crystal      
Liabilities:      
Contingent liabilities 0   0
Level 2 | CyDex      
Liabilities:      
Contingent liabilities 0   0
Level 2 | Metabasis      
Liabilities:      
Contingent liabilities 7,498,000   5,551,000
Level 3      
Assets:      
Short-term investments 65,000   0
Investment in Viking common stock 0   0
Investment in warrants 0   0
Total assets 65,000   0
Liabilities:      
Amounts owed to former licensor 0   0
Total liabilities 2,291,000   6,991,000
Level 3 | Crystal      
Liabilities:      
Contingent liabilities 1,826,000   6,477,000
Level 3 | CyDex      
Liabilities:      
Contingent liabilities 465,000   514,000
Level 3 | Metabasis      
Liabilities:      
Contingent liabilities $ 0   $ 0