Fair Value Measurement - Reconciliation of Level 3 Financial Instruments (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
|
| Liabilities | ||
| Payments to CVR holders and other contingency payments | $ (3,050) | $ (4,885) |
| Fair value adjustments to contingent liabilities | (30) | 3,466 |
| Level 3 | ||
| Liabilities | ||
| Fair value of level 3 financial instruments at beginning of period | 6,991 | |
| Payments to CVR holders and other contingency payments | (3,050) | |
| Fair value adjustments to contingent liabilities | 934 | |
| Fair value of level 3 financial instruments at end of period | $ 3,007 | $ 6,991 |