Loans and Allowance for Credit Losses (Summary of Activity in Allowance for Credit Losses) (Details) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Allowance for Loan Losses [Line Items]
Balance, beginning	$ 6,758,000	$ 7,065,000
Charge-offs	(16,000)	(47,000)
Recoveries	37,000	71,000
(Credit) Provision	(137,000)	(729,000)
Balance, ending	6,642,000	6,642,000	$ 7,065,000
Allowance for Credit Loss: Ending balance: collectively evaluated for impairment	6,642,000	6,642,000	7,065,000	$ 6,849,000
Total Loans Receivable	567,647,000	567,647,000	576,709,000
Gross Loans Receivable: Ending balance: individually evaluated for impairment	1,384,000	1,384,000	167,000	230,000
Gross Loans Receivable: Ending balance: collectively evaluated for impairment	566,263,000	566,263,000	576,542,000	563,917,000
Allowance for credit losses on loans	(6,642,000)	(6,642,000)	(7,065,000)	6,849,000
Deferred loan costs	3,843,000	$ 3,843,000	$ 3,893,000	3,872,000
Accounting Standards Update [Extensible Enumeration]		us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201613Member
Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for Loan Losses [Line Items]
Balance, beginning		$ 282,000
(Credit) Provision			$ 282,000
Balance, ending			282,000
Allowance for credit losses on loans			(282,000)
Real Estate Loans: One-to-Four Family [Member]
Allowance for Loan Losses [Line Items]
Balance, beginning	541,000	411,000
(Credit) Provision	(6,000)	(77,000)
Balance, ending	535,000	535,000	411,000
Allowance for Credit Loss: Ending balance: collectively evaluated for impairment	535,000	535,000	411,000	466,000
Total Loans Receivable	172,974,000	172,974,000	175,904,000
Gross Loans Receivable: Ending balance: individually evaluated for impairment	142,000	142,000	153,000	216,000
Gross Loans Receivable: Ending balance: collectively evaluated for impairment	172,832,000	172,832,000	175,751,000	171,354,000
Allowance for credit losses on loans	(535,000)	(535,000)	(411,000)
Real Estate Loans: One-to-Four Family [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for Loan Losses [Line Items]
Balance, beginning		201,000
Balance, ending			201,000
Allowance for credit losses on loans			(201,000)
Real Estate Loans: Home Equity [Member]
Allowance for Loan Losses [Line Items]
Balance, beginning	257,000	217,000
(Credit) Provision	(47,000)	(121,000)
Balance, ending	210,000	210,000	217,000
Allowance for Credit Loss: Ending balance: collectively evaluated for impairment	210,000	210,000	217,000	268,000
Total Loans Receivable	51,276,000	51,276,000	53,057,000
Gross Loans Receivable: Ending balance: individually evaluated for impairment			14,000	14,000
Gross Loans Receivable: Ending balance: collectively evaluated for impairment	51,276,000	51,276,000	53,043,000	50,619,000
Allowance for credit losses on loans	(210,000)	(210,000)	(217,000)
Real Estate Loans: Home Equity [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for Loan Losses [Line Items]
Balance, beginning		114,000
Balance, ending			114,000
Allowance for credit losses on loans			(114,000)
Real Estate Loans: Commercial [Member]
Allowance for Loan Losses [Line Items]
Balance, beginning	5,422,000	5,746,000
Recoveries	35,000	35,000
(Credit) Provision	(122,000)	(501,000)
Balance, ending	5,335,000	5,335,000	5,746,000
Allowance for Credit Loss: Ending balance: collectively evaluated for impairment	5,335,000	5,335,000	5,398,000	5,058,000
Total Loans Receivable	323,535,000	323,535,000	326,955,000
Gross Loans Receivable: Ending balance: individually evaluated for impairment	1,242,000	1,242,000
Gross Loans Receivable: Ending balance: collectively evaluated for impairment	322,293,000	322,293,000	304,037,000	295,582,000
Allowance for credit losses on loans	(5,335,000)	(5,335,000)	(5,746,000)
Real Estate Loans: Commercial [Member] | Construction Loans [Member]
Allowance for Loan Losses [Line Items]
Allowance for Credit Loss: Ending balance: collectively evaluated for impairment			348,000	383,000
Total Loans Receivable	23,900,000	23,900,000
Gross Loans Receivable: Ending balance: collectively evaluated for impairment			22,918,000	23,241,000
Real Estate Loans: Commercial [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for Loan Losses [Line Items]
Balance, beginning		55,000
Balance, ending			55,000
Allowance for credit losses on loans			(55,000)
Other Loans: Commercial [Member]
Allowance for Loan Losses [Line Items]
Balance, beginning	520,000	509,000
Recoveries		29,000
(Credit) Provision	25,000	(65,000)
Balance, ending	545,000	545,000	509,000
Allowance for Credit Loss: Ending balance: collectively evaluated for impairment	545,000	545,000	509,000	478,000
Total Loans Receivable	18,749,000	18,749,000	19,576,000
Gross Loans Receivable: Ending balance: collectively evaluated for impairment	18,749,000	18,749,000	19,576,000	21,950,000
Allowance for credit losses on loans	(545,000)	(545,000)	(509,000)
Other Loans: Commercial [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for Loan Losses [Line Items]
Balance, beginning		72,000
Balance, ending			72,000
Allowance for credit losses on loans			(72,000)
Other Loans: Consumer [Member]
Allowance for Loan Losses [Line Items]
Balance, beginning	18,000	47,000
Charge-offs	(16,000)	(47,000)
Recoveries	2,000	7,000
(Credit) Provision	13,000	35,000
Balance, ending	17,000	17,000	47,000
Allowance for Credit Loss: Ending balance: collectively evaluated for impairment	17,000	17,000	47,000	34,000
Total Loans Receivable	1,113,000	1,113,000	1,217,000
Gross Loans Receivable: Ending balance: collectively evaluated for impairment	1,113,000	1,113,000	1,217,000	1,171,000
Allowance for credit losses on loans	$ (17,000)	(17,000)	(47,000)
Other Loans: Consumer [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for Loan Losses [Line Items]
Balance, beginning		(25,000)
Balance, ending			(25,000)
Allowance for credit losses on loans			25,000
Other Loans: Unallocated [Member]
Allowance for Loan Losses [Line Items]
Balance, beginning		135,000
Balance, ending			135,000
Allowance for Credit Loss: Ending balance: collectively evaluated for impairment			135,000	$ 162,000
Allowance for credit losses on loans			(135,000)
Other Loans: Unallocated [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Allowance for Loan Losses [Line Items]
Balance, beginning		$ (135,000)
Balance, ending			(135,000)
Allowance for credit losses on loans			$ 135,000