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Income Taxes - Components of Current and Deferred Tax Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Current provision:    
Federal $ 0 $ 0
State 28 0
Total current provision 28 0
Deferred (benefit) provision:    
Federal (10,299) 44
State (4,756) 21
Total deferred (benefit) provision (15,055) 65
Total (benefit) provision for income taxes $ (15,027) $ 65