Note 4 - Loans - Loans Past Due (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 47	$ 431
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	19	9
Recorded investment	638,912	613,057
Financial Asset, 30 to 59 Days Past Due [Member]
Recorded investment	462	558
Financial Asset, 60 to 89 Days Past Due [Member]
Recorded investment	46	79
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	27	27
Recorded investment	46	36
Financial Asset, Past Due [Member]
Recorded investment	554	673
Financial Asset, Not Past Due [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	20	404
Recorded investment	638,358	612,384
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	0	276
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	9
Recorded investment	91,575	87,251
Commercial Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Recorded investment	0	0
Commercial Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Recorded investment	0	0
Commercial Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Recorded investment	0	9
Commercial Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Recorded investment	0	9
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Recorded investment	91,575	87,242
Commercial Real Estate Portfolio Segment [Member]
Recorded investment	314,786	306,913
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Recorded investment	299,768	291,775
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Recorded investment	15,018	15,138
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Other Commercial Real Estate Loans [Member]
Recorded investment	0	52
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Construction Loans [Member]
Recorded investment	0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Other Commercial Real Estate Loans [Member]
Recorded investment	0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Construction Loans [Member]
Recorded investment	0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Other Commercial Real Estate Loans [Member]
Recorded investment	0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction Loans [Member]
Recorded investment	0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Other Commercial Real Estate Loans [Member]
Recorded investment	0	52
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Construction Loans [Member]
Recorded investment	0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Other Commercial Real Estate Loans [Member]
Recorded investment	299,768	291,723
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Construction Loans [Member]
Recorded investment	15,018	15,138
Residential Portfolio Segment [Member]
Recorded investment	177,692	173,944
Residential Portfolio Segment [Member] | Construction Loans [Member]
Recorded investment	6,381	4,375
Residential Portfolio Segment [Member] | Residential Real Estate Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	20	22
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Recorded investment	146,674	143,506
Residential Portfolio Segment [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	27	133
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Recorded investment	24,637	26,063
Residential Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Construction Loans [Member]
Recorded investment	0	0
Residential Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Residential Real Estate Owner Occupied Loans [Member]
Recorded investment	116	125
Residential Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Recorded investment	0	0
Residential Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Construction Loans [Member]
Recorded investment	0	0
Residential Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Residential Real Estate Owner Occupied Loans [Member]
Recorded investment	7	0
Residential Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Recorded investment	0	0
Residential Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction Loans [Member]
Recorded investment	0	0
Residential Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential Real Estate Owner Occupied Loans [Member]
Recorded investment	0	0
Residential Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Recorded investment	27	27
Residential Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Construction Loans [Member]
Recorded investment	0	0
Residential Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Residential Real Estate Owner Occupied Loans [Member]
Recorded investment	123	125
Residential Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Recorded investment	27	27
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Construction Loans [Member]
Recorded investment	6,381	4,375
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Residential Real Estate Owner Occupied Loans [Member]
Recorded investment	146,551	143,381
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Recorded investment	24,610	26,036
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	19	0
Recorded investment	54,859	44,949
Consumer Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Recorded investment	346	381
Consumer Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Recorded investment	39	79
Consumer Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Recorded investment	19	0
Consumer Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Recorded investment	404	460
Consumer Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Recorded investment	$ 54,455	$ 44,489