Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
Fair Value Measurements - Assets and Liabilities at Fair Value (Details) - USD ($)
Jun. 30, 2019
Dec. 31, 2018
Assets:    
Short-term investments $ 1,059,002,000 $ 601,217,000
Investment in Viking common stock 50,116,000 46,191,000
Investment in warrants 10,260,000 9,257,000
Total assets 1,119,378,000 656,665,000
Liabilities:    
Amounts owed to former licensor 131,000 199,000
Total liabilities 13,208,000 12,741,000
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 4,987,000 6,477,000
CyDex    
Liabilities:    
Contingent liabilities 464,000 514,000
Metabasis    
Liabilities:    
Contingent liabilities 7,626,000 5,551,000
Level 1    
Assets:    
Short-term investments 5,082,000 1,326,000
Investment in Viking common stock 50,116,000 46,191,000
Investment in warrants 10,260,000 9,257,000
Total assets 65,458,000 56,774,000
Liabilities:    
Amounts owed to former licensor 131,000 199,000
Total liabilities 131,000 199,000
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 1,053,764,000 599,891,000
Investment in Viking common stock 0 0
Investment in warrants 0 0
Total assets 1,053,764,000 599,891,000
Liabilities:    
Amounts owed to former licensor 0 0
Total liabilities 7,626,000 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 7,626,000 5,551,000
Level 3    
Assets:    
Short-term investments 156,000 0
Investment in Viking common stock 0 0
Investment in warrants 0 0
Total assets 156,000 0
Liabilities:    
Amounts owed to former licensor 0 0
Total liabilities 5,451,000 6,991,000
Level 3 | Crystal    
Liabilities:    
Contingent liabilities 4,987,000 6,477,000
Level 3 | CyDex    
Liabilities:    
Contingent liabilities 464,000 514,000
Level 3 | Metabasis    
Liabilities:    
Contingent liabilities $ 0 $ 0