Income Taxes - Summary of the provision for income taxes (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Components of Income Tax Expense (Benefit), Continuing Operations [Abstract] | ||
| Current provision | $ (2) | $ (2) |
| Deferred expense | 2 | 2 |
| Provision for income taxes | $ 0 | $ 0 |