Loans and Allowance for Credit Losses - Loans - Non-accrual loans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	$ 4,512,000	$ 4,127,000
Transfer into non-accrual	1,283,000	2,234,000
Transfer to OREO	0
Loans paid down/payoffs	(4,218,000)	(880,000)
Loans return to accrual status	(996,000)	(594,000)
Loans charged off	(243,000)	(375,000)
Balance	338,000	4,512,000
Real Estate Loan
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	4,299,000
Balance	123,000	4,299,000
Commercial and Industrial
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	71,000
Single-family | Real Estate Loan
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	270,000	790,000
Transfer into non-accrual		64,000
Loans paid down/payoffs	(147,000)	(584,000)
Balance	123,000	270,000
Multi-family | Real Estate Loan
Financing Receivable Nonaccrual Status [Roll Forward]
Balance		24,000
Loans paid down/payoffs		(24,000)
Commercial | Real Estate Loan
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	4,029,000	3,139,000
Transfer into non-accrual	920,000	1,619,000
Loans paid down/payoffs	(3,987,000)	(152,000)
Loans return to accrual status	(962,000)	(577,000)
Balance		4,029,000
Commercial | Consumer Loans
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	213,000
Balance	144,000	213,000
SBA Guaranty | Real Estate Loan
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	71,000
SBA Guaranty | Commercial and Industrial
Financing Receivable Nonaccrual Status [Roll Forward]
Transfer into non-accrual	71,000
Balance	71,000
Consumer and Indirect | Consumer Loans
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	34,000	51,000
Transfer into non-accrual	1,000
Loans paid down/payoffs	(1,000)	(17,000)
Loans return to accrual status	(34,000)
Balance		34,000
Automobile | Consumer Loans
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	179,000	123,000
Transfer into non-accrual	291,000	551,000
Loans paid down/payoffs	(83,000)	(103,000)
Loans return to accrual status		(17,000)
Loans charged off	(243,000)	(375,000)
Balance	$ 144,000	$ 179,000