Income Taxes - Schedule of Components of Deferred Tax Assets and Liabilities (Detail) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Allowance for loan losses	$ 977,000	$ 988,000
Deferred compensation liabilities	494,000	468,000
Contribution carryforward	171,000	120,000
State tax credit carryforward	62,000	52,000
Depreciation	16,000
Securities available-for-sale	3,873,000
Net operating loss carryforward	707,000
Other	48,000	56,000
Subtotal	6,348,000	1,684,000
Less: valuation allowance	(171,000)	(60,000)
Total deferred tax assets	6,177,000	1,624,000
Deferred tax liabilities:
Depreciation		(45,000)
Interest rate swaps	(260,000)	(54,000)
Securities available-for-sale		(213,000)
Prepaid expenses	(43,000)	(43,000)
Net deferred loan costs	(661,000)	(447,000)
Mortgage servicing rights	(96,000)	(87,000)
Total deferred tax liabilities	(1,060,000)	(889,000)
Net deferred tax assets, included in other assets	$ 5,117,000	$ 735,000