Note 4 - Loans - Loans Past Due (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Jun. 30, 2021
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 544	$ 1,771
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Recorded investment	604,836	567,611
Financial Asset, 30 to 59 Days Past Due [Member]
Recorded investment	362	124
Financial Asset, 60 to 89 Days Past Due [Member]
Recorded investment	31	186
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	27	994
Recorded investment	27	994
Financial Asset, Past Due [Member]
Recorded investment	420	1,304
Financial Asset, Not Past Due [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	517	777
Recorded investment	604,416	566,307
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	289	303
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Recorded investment	91,481	110,287
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	0
Commercial Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Recorded investment	0	0
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Recorded investment	91,481	110,287
Commercial Real Estate Portfolio Segment [Member]
Recorded investment	305,108	280,026
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	206	874
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Recorded investment	291,712	269,548
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Recorded investment	13,396	10,478
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Other Commercial Real Estate Loans [Member]
Recorded investment	0	0
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	175
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	629
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	804
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	291,712	268,744
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Construction Loans [Member]
Recorded investment	13,396	10,478
Residential Portfolio Segment [Member]
Recorded investment	167,490	147,648
Residential Portfolio Segment [Member] | Construction Loans [Member]
Recorded investment	6,501	9,169
Residential Portfolio Segment [Member] | Residential Real Estate Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	22	392
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Recorded investment	139,093	119,331
Residential Portfolio Segment [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	27	202
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Recorded investment	21,896	19,148
Residential Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Construction Loans [Member]
Recorded investment	1	0
Residential Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Residential Real Estate Owner Occupied Loans [Member]
Recorded investment	53	29
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	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	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	365
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	0
Residential Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Construction Loans [Member]
Recorded investment	1	0
Residential Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Residential Real Estate Owner Occupied Loans [Member]
Recorded investment	53	394
Residential Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Recorded investment	27	0
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Construction Loans [Member]
Recorded investment	6,500	9,169
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Residential Real Estate Owner Occupied Loans [Member]
Recorded investment	139,040	118,937
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Recorded investment	21,869	19,148
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Recorded investment	40,757	29,650
Consumer Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Recorded investment	308	95
Consumer Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Recorded investment	31	11
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	339	106
Consumer Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Recorded investment	$ 40,418	$ 29,544