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Income Taxes - Difference between Income Taxes Computed at Federal Statutory Rate and Provision for Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]    
Expected income tax expense (benefit) at statutory rate $ (24,258) $ 5,489
Permanent differences (48) 123
Adjustment to NOL 2,567 1,119
Change in valuation allowance 8,876 0
Other 368 61
Total income tax (benefit) expense $ (12,495) $ 6,792