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Stock-Based Compensation - Board of Director Equity Awards - Additional Information (Detail) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
May 31, 2021
Feb. 28, 2021
Dec. 31, 2021
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Director share awards     61,186 60,998
Director        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Grants vesting period 1 year      
Director share awards 61,186     60,998
Shares vested 49,652      
Company's stock at fair value       $ 400
Shares vested     52,068 63,413
Restricted shares vested grant date intrinsic value $ 300      
Service Based Restricted Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted shares vested grant date intrinsic value     $ 2,200 $ 1,900
Service Based Restricted Stock [Member] | One New Director [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Grants vesting period       3 years
Service Based Restricted Stock [Member] | New Directors [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Equity awards granted       $ 55
Service Based Stock [Member] | One New Director [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Company's stock at fair value   $ 20    
Shares vested   2,416