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Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Beginning balance $ 1,334 $ 993 $ 894
Additions for current years’ tax positions 31 14 73
Additions for prior years’ tax positions (1) 15 427 26
Reductions for prior years’ tax positions (63) (73) 0
Reductions for expiration of statute of limitations (63) (27)  
Ending balance $ 1,254 $ 1,334 $ 993