Annual report pursuant to Section 13 and 15(d)

Income Taxes - Schedule of Unrecognized Tax Benefits (Details)

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Income Taxes - Schedule of Unrecognized Tax Benefits (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Unrecognized tax benefits, beginning balance $ 700,000 $ 1,600,000  
Gross change for current year positions 0 0 $ 200,000
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions 700,000 0 0
Decreases for prior period positions 0 (900,000) (3,400,000)
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations (100,000) 0 0
Unrecognized tax benefits, ending balance $ 1,300,000 $ 700,000 $ 1,600,000