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Income Taxes - Change In Valuation Allowance (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Changes In The Valuation Allowance For Deferred Tax Assets [Roll Forward]    
Valuation allowance at the beginning of the year $ 20,596 $ 16,797
Decreases recorded as benefits to income tax provision 0 0
Increases recorded to income tax provision 6,562 3,799
Valuation allowance at the end of the year $ 27,158 $ 20,596