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Income Taxes - Components of Provision (Benefit) for Income Taxes (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Current:    
Federal $ 950 $ (1,798)
State 80 123
Total current 1,030 (1,675)
Deferred:    
Federal (1,491) 3,536
State (56) (440)
Total deferred (1,547) 3,096
Total income tax provision (benefit) $ (517) $ 1,421