Composition of Certain Financial Statement Captions - Schedule of Other Non-current Liabilities (Details) - USD ($) $ in Thousands |
Dec. 31, 2020 |
Dec. 31, 2019 |
|---|---|---|
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | ||
| Long-term operating lease liabilities | $ 13,970 | $ 9,811 |
| Income taxes payable | 7,352 | 7,656 |
| CARES Act payroll tax deferral | 16,806 | 0 |
| Other | 4,197 | 2,530 |
| Other non-current liabilities | $ 42,325 | $ 19,997 |