Note 4 - Loans and Allowance for Loan Losses - Aging of Recorded Investment in Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable	$ 590,459	$ 566,548
Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable		286
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable	2,023	2,765
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable	706	576
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable	725	846
Financial Asset, Past Due [Member]
Financing Receivable	3,454	4,187
Financial Asset, Not Past Due [Member]
Financing Receivable	587,005	562,075
Residential Portfolio Segment [Member] \| One-to-four Family Loan [Member]
Financing Receivable	128,345
Residential Portfolio Segment [Member] \| One-to-four Family Loan [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable	1,418
Residential Portfolio Segment [Member] \| One-to-four Family Loan [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable	260
Residential Portfolio Segment [Member] \| One-to-four Family Loan [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable	673
Residential Portfolio Segment [Member] \| One-to-four Family Loan [Member] \| Financial Asset, Past Due [Member]
Financing Receivable	2,351
Residential Portfolio Segment [Member] \| One-to-four Family Loan [Member] \| Financial Asset, Not Past Due [Member]
Financing Receivable	125,994
Residential Portfolio Segment [Member] \| Home Equity and Second Mortgage [Member]
Financing Receivable	58,632
Residential Portfolio Segment [Member] \| Multifamily [Member]
Financing Receivable	39,317
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	39,317
Consumer Portfolio Segment [Member] \| Home Equity and Second Mortgage [Member]
Financing Receivable	58,632	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	354	206
Consumer Portfolio Segment [Member] \| Home Equity and Second Mortgage [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable	292	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	646	577
Consumer Portfolio Segment [Member] \| Home Equity and Second Mortgage [Member] \| Financial Asset, Not Past Due [Member]
Financing Receivable	57,986	58,756
Consumer Portfolio Segment [Member] \| All Other Consumer Excluding Home Equity and Second Mortgage [Member]
Financing Receivable	54,727	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	251	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	46	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	297	287
Consumer Portfolio Segment [Member] \| All Other Consumer Excluding Home Equity and Second Mortgage [Member] \| Financial Asset, Not Past Due [Member]
Financing Receivable	54,430	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	169,202	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	0	0
Real Estate Mortgage Portfolio Segment [Member] \| Commercial Real Estate Loan [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable	58	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	58	0
Real Estate Mortgage Portfolio Segment [Member] \| Commercial Real Estate Loan [Member] \| Financial Asset, Not Past Due [Member]
Financing Receivable	169,144	161,675
Construction [Member] \| One-to-four Family Residential Construction [Member]
Financing Receivable	17,657
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	17,657
Construction [Member] \| Other Construction, Development and Land [Member]
Financing Receivable	57,535
Construction [Member] \| Other Construction, Development and Land [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable	0
Construction [Member] \| Other Construction, Development and Land [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable	50
Construction [Member] \| Other Construction, Development and Land [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable	52
Construction [Member] \| Other Construction, Development and Land [Member] \| Financial Asset, Past Due [Member]
Financing Receivable	102
Construction [Member] \| Other Construction, Development and Land [Member] \| Financial Asset, Not Past Due [Member]
Financing Receivable	57,433
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	65,044
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	$ 65,044

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

Jun. 30, 2023

Dec. 31, 2022

Financing Receivable

$ 590,459

$ 566,548

Financial Asset Acquired with Credit Deterioration [Member]

Financing Receivable

286

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

Financing Receivable

2,023