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Income Taxes - Components of Income Tax Expense (Benefit) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Current    
Federal $ 0 $ 0
State 2 5
Foreign 0 0
Total current 2 5
Deferred expense    
Federal (239) 0
State 0 (22)
Foreign 0 0
Total deferred (239) (22)
Total income tax benefit $ (237) $ (17)