Note 4 - Loans and Allowance for Credit Losses - Aging of Recorded Investment in Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable	$ 622,414	$ 566,548
Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable		286
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable	3,798	2,765
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable	456	576
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable	536	846
Financial Asset, Past Due [Member]
Financing Receivable	4,790	4,187
Financial Asset, Not Past Due [Member]
Financing Receivable	617,624	562,075
Residential Portfolio Segment [Member] \| One-to-four Family Loan [Member]
Financing Receivable	133,601
Residential Portfolio Segment [Member] \| One-to-four Family Loan [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable	2,104
Residential Portfolio Segment [Member] \| One-to-four Family Loan [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable	335
Residential Portfolio Segment [Member] \| One-to-four Family Loan [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable	482
Residential Portfolio Segment [Member] \| One-to-four Family Loan [Member] \| Financial Asset, Past Due [Member]
Financing Receivable	2,921
Residential Portfolio Segment [Member] \| One-to-four Family Loan [Member] \| Financial Asset, Not Past Due [Member]
Financing Receivable	130,680
Residential Portfolio Segment [Member] \| Home Equity and Second Mortgage [Member]
Financing Receivable	63,301
Residential Portfolio Segment [Member] \| Multifamily [Member]
Financing Receivable	39,946
Residential Portfolio Segment [Member] \| Multifamily [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable	0
Residential Portfolio Segment [Member] \| Multifamily [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable	0
Residential Portfolio Segment [Member] \| Multifamily [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable	0
Residential Portfolio Segment [Member] \| Multifamily [Member] \| Financial Asset, Past Due [Member]
Financing Receivable	0
Residential Portfolio Segment [Member] \| Multifamily [Member] \| Financial Asset, Not Past Due [Member]
Financing Receivable	39,946
Consumer Portfolio Segment [Member] \| Home Equity and Second Mortgage [Member]
Financing Receivable	63,301	59,333
Consumer Portfolio Segment [Member] \| Home Equity and Second Mortgage [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable		0
Consumer Portfolio Segment [Member] \| Home Equity and Second Mortgage [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable	396	206
Consumer Portfolio Segment [Member] \| Home Equity and Second Mortgage [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable	70	278
Consumer Portfolio Segment [Member] \| Home Equity and Second Mortgage [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable	0	93
Consumer Portfolio Segment [Member] \| Home Equity and Second Mortgage [Member] \| Financial Asset, Past Due [Member]
Financing Receivable	466	577
Consumer Portfolio Segment [Member] \| Home Equity and Second Mortgage [Member] \| Financial Asset, Not Past Due [Member]
Financing Receivable	62,835	58,756
Consumer Portfolio Segment [Member] \| All Other Consumer Excluding Home Equity and Second Mortgage [Member]
Financing Receivable	56,373	64,265
Consumer Portfolio Segment [Member] \| All Other Consumer Excluding Home Equity and Second Mortgage [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable		0
Consumer Portfolio Segment [Member] \| All Other Consumer Excluding Home Equity and Second Mortgage [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable	302	211
Consumer Portfolio Segment [Member] \| All Other Consumer Excluding Home Equity and Second Mortgage [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable	51	72
Consumer Portfolio Segment [Member] \| All Other Consumer Excluding Home Equity and Second Mortgage [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable	0	4
Consumer Portfolio Segment [Member] \| All Other Consumer Excluding Home Equity and Second Mortgage [Member] \| Financial Asset, Past Due [Member]
Financing Receivable	353	287
Consumer Portfolio Segment [Member] \| All Other Consumer Excluding Home Equity and Second Mortgage [Member] \| Financial Asset, Not Past Due [Member]
Financing Receivable	56,020	63,978
Real Estate Mortgage Portfolio Segment [Member] \| Residential Loan [Member]
Financing Receivable		155,938
Real Estate Mortgage Portfolio Segment [Member] \| Residential Loan [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable		286
Real Estate Mortgage Portfolio Segment [Member] \| Residential Loan [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable		2,229
Real Estate Mortgage Portfolio Segment [Member] \| Residential Loan [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable		226
Real Estate Mortgage Portfolio Segment [Member] \| Residential Loan [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable		543
Real Estate Mortgage Portfolio Segment [Member] \| Residential Loan [Member] \| Financial Asset, Past Due [Member]
Financing Receivable		2,998
Real Estate Mortgage Portfolio Segment [Member] \| Residential Loan [Member] \| Financial Asset, Not Past Due [Member]
Financing Receivable		152,654
Real Estate Mortgage Portfolio Segment [Member] \| Land Loan [Member]
Financing Receivable		21,997
Real Estate Mortgage Portfolio Segment [Member] \| Land Loan [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable		0
Real Estate Mortgage Portfolio Segment [Member] \| Land Loan [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable		119
Real Estate Mortgage Portfolio Segment [Member] \| Land Loan [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable		0
Real Estate Mortgage Portfolio Segment [Member] \| Land Loan [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable		51
Real Estate Mortgage Portfolio Segment [Member] \| Land Loan [Member] \| Financial Asset, Past Due [Member]
Financing Receivable		170
Real Estate Mortgage Portfolio Segment [Member] \| Land Loan [Member] \| Financial Asset, Not Past Due [Member]
Financing Receivable		21,827
Real Estate Mortgage Portfolio Segment [Member] \| Construction Loans [Member]
Financing Receivable		42,364
Real Estate Mortgage Portfolio Segment [Member] \| Construction Loans [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable		0
Real Estate Mortgage Portfolio Segment [Member] \| Construction Loans [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable		0
Real Estate Mortgage Portfolio Segment [Member] \| Construction Loans [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable		0
Real Estate Mortgage Portfolio Segment [Member] \| Construction Loans [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable		0
Real Estate Mortgage Portfolio Segment [Member] \| Construction Loans [Member] \| Financial Asset, Past Due [Member]
Financing Receivable		0
Real Estate Mortgage Portfolio Segment [Member] \| Construction Loans [Member] \| Financial Asset, Not Past Due [Member]
Financing Receivable		42,364
Real Estate Mortgage Portfolio Segment [Member] \| Commercial Real Estate Loan [Member]
Financing Receivable	168,645	161,675
Real Estate Mortgage Portfolio Segment [Member] \| Commercial Real Estate Loan [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable		0
Real Estate Mortgage Portfolio Segment [Member] \| Commercial Real Estate Loan [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable	834	0
Real Estate Mortgage Portfolio Segment [Member] \| Commercial Real Estate Loan [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable	0	0
Real Estate Mortgage Portfolio Segment [Member] \| Commercial Real Estate Loan [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable	0	0
Real Estate Mortgage Portfolio Segment [Member] \| Commercial Real Estate Loan [Member] \| Financial Asset, Past Due [Member]
Financing Receivable	834	0
Real Estate Mortgage Portfolio Segment [Member] \| Commercial Real Estate Loan [Member] \| Financial Asset, Not Past Due [Member]
Financing Receivable	167,811	161,675
Construction [Member] \| One-to-four Family Residential Construction [Member]
Financing Receivable	15,667
Construction [Member] \| One-to-four Family Residential Construction [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable	0
Construction [Member] \| One-to-four Family Residential Construction [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable	0
Construction [Member] \| One-to-four Family Residential Construction [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable	0
Construction [Member] \| One-to-four Family Residential Construction [Member] \| Financial Asset, Past Due [Member]
Financing Receivable	0
Construction [Member] \| One-to-four Family Residential Construction [Member] \| Financial Asset, Not Past Due [Member]
Financing Receivable	15,667
Construction [Member] \| Other Construction, Development and Land [Member]
Financing Receivable	76,669
Construction [Member] \| Other Construction, Development and Land [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable	162
Construction [Member] \| Other Construction, Development and Land [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable	0
Construction [Member] \| Other Construction, Development and Land [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable	54
Construction [Member] \| Other Construction, Development and Land [Member] \| Financial Asset, Past Due [Member]
Financing Receivable	216
Construction [Member] \| Other Construction, Development and Land [Member] \| Financial Asset, Not Past Due [Member]
Financing Receivable	76,453
Commercial Portfolio Segment [Member]
Financing Receivable		60,976
Commercial Portfolio Segment [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable		0
Commercial Portfolio Segment [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable		0
Commercial Portfolio Segment [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable		0
Commercial Portfolio Segment [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable		155
Commercial Portfolio Segment [Member] \| Financial Asset, Past Due [Member]
Financing Receivable		155
Commercial Portfolio Segment [Member] \| Financial Asset, Not Past Due [Member]
Financing Receivable		$ 60,821
Commercial Portfolio Segment [Member] \| Commercial Business [Member]
Financing Receivable	68,212
Commercial Portfolio Segment [Member] \| Commercial Business [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable	0
Commercial Portfolio Segment [Member] \| Commercial Business [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable	0
Commercial Portfolio Segment [Member] \| Commercial Business [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable	0
Commercial Portfolio Segment [Member] \| Commercial Business [Member] \| Financial Asset, Past Due [Member]
Financing Receivable	0
Commercial Portfolio Segment [Member] \| Commercial Business [Member] \| Financial Asset, Not Past Due [Member]
Financing Receivable	$ 68,212

Note 4 - Loans and Allowance for Credit Losses - Aging of Recorded Investment in Loans (Details) - USD ($)
$ in Thousands

Dec. 31, 2023

Dec. 31, 2022

Financing Receivable

$ 622,414

$ 566,548

Financial Asset Acquired with Credit Deterioration [Member]

Financing Receivable

286

Financial Asset, 30 to 59 Days Past Due [Member]

Financing Receivable

3,798