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Loans and Allowance for Loan Losses - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Loans and Leases Receivable Disclosure [Line Items]          
Deferred loan fees $ 1,004,155   $ 1,004,155   $ 899,096
Debt securities, held-to-maturity, 90 days or more past due, still accruing 0   0   0
Loan restructuring trial modifications, amount     0 $ 0  
Small Business Administration [Member]          
Loans and Leases Receivable Disclosure [Line Items]          
Debt instrument, Collateral fee $ 0 $ 254,000 $ 0 481,000  
Small Business Administration [Member] | Minimum [Member]          
Loans and Leases Receivable Disclosure [Line Items]          
Percentage of guarantee made to eligible borrowers under PPP loans     1.00%    
Small Business Administration [Member] | Maximum [Member]          
Loans and Leases Receivable Disclosure [Line Items]          
Percentage of guarantee made to eligible borrowers under PPP loans     5.00%    
Paycheck Protection Program [Member]          
Loans and Leases Receivable Disclosure [Line Items]          
Debt instrument interest rate, stated percentage 1.00%   1.00%    
Percentage of guarantee made to eligible borrowers under PPP loans     100.00%    
Paycheck Protection Program [Member] | Minimum [Member]          
Loans and Leases Receivable Disclosure [Line Items]          
Debt instrument, term     2 years    
Paycheck Protection Program [Member] | Maximum [Member]          
Loans and Leases Receivable Disclosure [Line Items]          
Debt instrument, term     5 years    
Paycheck Protection Program [Member] | Small Business Administration [Member]          
Loans and Leases Receivable Disclosure [Line Items]          
Debt instrument, Collateral fee $ 3,600 $ 79,400 $ 58,800 $ 284,700  
Deferred loan fees $ 3,600   $ 3,600   $ 62,000