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Employee Benefit Plans - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Employee Stock Ownership Plan (ESOP) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Shares Issued Under Employee Benefit plan 104,058 79,800
The 401k Profit Sharing Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan Expense $ 1,200 $ 700
Defined contribution plan employees match percentage 100.00%  
Maximum [Member] | The 401k Profit Sharing Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Employer Matching Contribution 5.00%