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Income Taxes - Income Tax Provisions and Deferred Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Federal income tax provision (benefit)      
Current $ 0 $ 0 $ 0
Deferred (935) 0 0
State income tax provision (benefit)      
Current 629 14 28
Deferred 0 0 0
Total income tax provision (benefit) $ (306) $ 14 $ 28