Loans and Allowance for Loan Losses - Summary Of Allowance For Loan Losses - (Detail) - USD ($)	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	$ 4,183,599	$ 4,085,719
Charge-offs	(8,633)	(26,965)
Recoveries	36,123	28,646
Net recoveries	27,490	1,681
Provision for allowance for loan losses	0	0
Ending balance	4,211,089	4,087,400
Consumer loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Charge-offs	(8,633)	(15,842)
Recoveries	1,066	3,912
Commercial and industrial loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Charge-offs	0	0
Recoveries	17,126	7,250
Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Charge-offs	0	(11,123)
Recoveries	17,931	17,484
Real Estate [Member] \| Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Charge-offs	0	(11,123)
Recoveries	17,931	6,139
Real Estate [Member] \| Home equity [Member]
Loans and Leases Receivable Disclosure [Line Items]
Charge-offs	0	0
Recoveries	0	0
Real Estate [Member] \| Multi-family [Member]
Loans and Leases Receivable Disclosure [Line Items]
Charge-offs	0	0
Recoveries	0	0
Real Estate [Member] \| Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Charge-offs	0	0
Recoveries	0	0
Real Estate [Member] \| Construction and land development [Member]
Loans and Leases Receivable Disclosure [Line Items]
Charge-offs	0	0
Recoveries	$ 0	$ 11,345

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount of expense related to estimated loss from loan and lease transactions.

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