Income Taxes - Reconciliation of the Beginning and Ending Amounts of Unrecognized Tax Benefits Roll Forward (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
|
| Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] | ||
| Balance as of beginning of period | $ 141 | $ 940 |
| Decrease due to prior positions | 0 | (799) |
| Increase due to current year tax positions | 0 | 0 |
| Balance as of end of period | $ 141 | $ 141 |