Note 4 - Loans - Loans Past Due (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Jun. 30, 2022
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 47	$ 431
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	9
Recorded investment	666,463	613,057
Financial Asset, 30 to 59 Days Past Due [Member]
Recorded investment	1,083	558
Financial Asset, 60 to 89 Days Past Due [Member]
Recorded investment	141	79
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	27	27
Recorded investment	27	36
Financial Asset, Past Due [Member]
Recorded investment	1,251	673
Financial Asset, Not Past Due [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	20	404
Recorded investment	665,212	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	103,793	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	103,793	87,242
Residential Portfolio Segment [Member]
Recorded investment	181,883	173,944
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	150,571	143,506
Residential Portfolio Segment [Member] | Construction Loans [Member]
Recorded investment	7,784	4,375
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	23,528	26,063
Residential Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Residential Real Estate Owner Occupied Loans [Member]
Recorded investment	532	125
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 Non-owner Occupied 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	6	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 Non-owner Occupied Loans [Member]
Recorded investment	4	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] | 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 Non-owner Occupied Loans [Member]
Recorded investment	27	27
Residential Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Residential Real Estate Owner Occupied Loans [Member]
Recorded investment	538	125
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 Non-owner Occupied Loans [Member]
Recorded investment	31	27
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Residential Real Estate Owner Occupied Loans [Member]
Recorded investment	150,033	143,381
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Construction Loans [Member]
Recorded investment	7,784	4,375
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Recorded investment	23,497	26,036
Commercial Real Estate Portfolio Segment [Member]
Recorded investment	318,324	306,913
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Recorded investment	16,655	15,138
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Real Estate Loans [Member]
Recorded investment	301,669	291,775
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, 30 to 59 Days Past Due [Member] | Other Commercial Real Estate Loans [Member]
Recorded investment	52	52
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, 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, 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, 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, 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	52	52
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Construction Loans [Member]
Recorded investment	16,655	15,138
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Other Commercial Real Estate Loans [Member]
Recorded investment	301,617	291,723
Consumer Portfolio Segment [Member]
Recorded investment	62,463	44,949
Consumer Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Recorded investment	499	381
Consumer Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Recorded investment	131	79
Consumer Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Recorded investment	0	0
Consumer Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Recorded investment	630	460
Consumer Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Recorded investment	$ 61,833	$ 44,489