Income Taxes - Net Deferred Tax Asset and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Allowance for loan losses	$ 780	$ 735
Deferred compensation	1,070	859
Accrued employee benefits	102	122
NOL and charitable contribution carryforwards	3,442	3,492
Premises and equipment	40	6
ESOP release of shares	32	17
Other	82	57
Total deferred tax assets	5,548	5,288
Deferred tax liabilities:
Loan fees	179	48
Unrealized gain on available for sale securities	52	420
Mortgage servicing rights	556	491
FHLB stock dividends	26	26
Total deferred tax liabilities	813	985
Net deferred tax asset/liability	4,735	4,303
Valuation allowance	(934)	(934)
Net deferred tax assets	$ 3,801	$ 3,369