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Income Taxes - Reconciliation of Beginning and Ending Amount of Uncertain Tax Positions (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Tax Disclosure [Abstract]      
Balance at beginning of year $ 464 $ 519 $ 577
Reductions for tax positions of prior years $ (464) (55) (58)
Balance at end of year   $ 464 $ 519