Accrued Expenses and Other Current Liabilities - Summary of Accrued Severance Costs (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Restructuring Reserve [Roll Forward] | ||
| Balance at beginning of the year | $ 56 | $ 274 |
| Charged to expense | 970 | 607 |
| Balance at end of year | 21 | 56 |
| 2018 Restructuring Plan | ||
| Restructuring Reserve [Roll Forward] | ||
| Cash payments | 0 | (268) |
| 2019 Restructuring Plan | ||
| Restructuring Reserve [Roll Forward] | ||
| Cash payments | (56) | (557) |
| 2020 Restructuring Plan | ||
| Restructuring Reserve [Roll Forward] | ||
| Cash payments | $ (949) | $ 0 |