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Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Detail) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Current:        
Federal     $ 72,000 $ (242,000)
State     (34,000) 10,000
Total current income tax expense (benefit)     38,000 (232,000)
Deferred:        
Federal     0 0
State     0 0
Total deferred income tax expense     0 0
Income tax expense (benefit) $ 1,010,000 $ 6,000 $ 38,000 $ (232,000)