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Income Taxes - Unrecognized Tax Benefits (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Unrecognized Tax Benefits    
Unrecognized Tax Benefits, Beginning Balance $ 2,172  
Increase related to current year tax position 72  
Increase related to prior year tax position 1,068  
Unrecognized Tax Benefits, Ending Balance 3,312  
Unrecognized tax benefits expected to be recognized in next twelve months 852  
Unrecognized tax benefits, accrued interest and penalties $ 255 $ 238