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Income Taxes - Unrecognized Tax Benefits Associated with Uncertain Tax Positions (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits [Roll Forward]    
Beginning balance $ 0 $ 0
Additions of current year tax positions 722
Additions of prior year tax positions 0 0
Reduction of prior year tax positions 0 0
Settlements 0 0
Lapse of statute of limitations 0 0
Ending balance $ 722 $ 0