Note 4 - Loans - Loans Past Due (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 1,771	$ 1,185
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		41
Recorded investment	567,611	544,797
Financial Asset, 30 to 59 Days Past Due [Member]
Recorded investment	124	127
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status		2
Recorded investment	186	51
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	994	792
Recorded investment	994	833
Financial Asset, Past Due [Member]
Recorded investment	1,304	1,011
Financial Asset, Not Past Due [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	777
Recorded investment	566,307	543,786
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	303	21
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing
Recorded investment	110,287	157,328
Commercial Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Recorded investment
Commercial Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Recorded investment
Commercial Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Recorded investment		21
Commercial Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Recorded investment		21
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Recorded investment	110,287	157,307
Commercial Real Estate Portfolio Segment [Member]
Recorded investment	280,026	245,957
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	874	785
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing
Recorded investment	269,548	229,716
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Recorded investment	10,478	16,241
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Other Commercial Real Estate Loans [Member]
Recorded investment
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Construction Loans [Member]
Recorded investment
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Other Commercial Real Estate Loans [Member]
Recorded investment	175	2
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Construction Loans [Member]
Recorded investment
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	629	628
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction Loans [Member]
Recorded investment
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Other Commercial Real Estate Loans [Member]
Recorded investment	804	630
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Construction Loans [Member]
Recorded investment
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Other Commercial Real Estate Loans [Member]
Recorded investment	268,744	229,086
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Construction Loans [Member]
Recorded investment	10,478	16,241
Residential Portfolio Segment [Member]
Recorded investment	147,648	120,119
Residential Portfolio Segment [Member] | Construction Loans [Member]
Recorded investment	9,169	9,435
Residential Portfolio Segment [Member] | Residential Real Estate Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	392	143
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		29
Recorded investment	119,331	91,274
Residential Portfolio Segment [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	202	236
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing
Recorded investment	19,148	19,410
Residential Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Construction Loans [Member]
Recorded investment
Residential Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Residential Real Estate Owner Occupied Loans [Member]
Recorded investment	29
Residential Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Recorded investment
Residential Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Construction Loans [Member]
Recorded investment
Residential Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Residential Real Estate Owner Occupied Loans [Member]
Recorded investment
Residential Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Recorded investment
Residential Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction Loans [Member]
Recorded investment
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	365	172
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
Residential Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Construction Loans [Member]
Recorded investment
Residential Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Residential Real Estate Owner Occupied Loans [Member]
Recorded investment	394	172
Residential Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Recorded investment
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Construction Loans [Member]
Recorded investment	9,169	9,435
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Residential Real Estate Owner Occupied Loans [Member]
Recorded investment	118,937	91,102
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Recorded investment	19,148	19,410
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		12
Recorded investment	29,650	21,393
Consumer Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Recorded investment	95	127
Consumer Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Recorded investment	11	49
Consumer Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Recorded investment		12
Consumer Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Recorded investment	106	188
Consumer Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Recorded investment	$ 29,544	$ 21,205