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Covid-19 (Details) - USD ($) $ in Thousands |  | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Apr. 16, 2020 | Apr. 30, 2020 | Sep. 30, 2020 | Mar. 31, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Coronavirus, Aid, Relief, And Economic Securities (CARES) Act, deferred tax assets, valuation allowance |  |  |  | $ 100 |  |
Coronavirus, Aid, Relief, And Economic Securities (CARES) Act, deferred tax assets, income tax benefit |  |  |  | $ 100 |  |
Proceeds from government assistance |  | $ 700 | $ 0 |  |  | $ 700
Proceeds from Paycheck Protection Program loan |  |  |  |  | $ 0 | $ 2,865
Paycheck Protection Program, CARES Act |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Proceeds from Paycheck Protection Program loan | $ 2,900 |  |  |  |  |

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