Note 4 - Loans - Loans Past Due (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 1,719	$ 1,771
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	41
Recorded investment	578,453	567,611
Financial Asset, 30 to 59 Days Past Due [Member]
Recorded investment	130	124
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	209
Recorded investment	225	186
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	752	994
Recorded investment	752	994
Financial Asset, Past Due [Member]
Recorded investment	1,107	1,304
Financial Asset, Not Past Due [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	758	777
Recorded investment	577,346	566,307
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	298	303
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Recorded investment	94,364	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	94,364	110,287
Commercial Real Estate Portfolio Segment [Member]
Recorded investment	287,009	280,026
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	865	874
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Recorded investment	269,550	269,548
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Recorded investment	17,459	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	629	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	629	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	268,921	268,744
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Construction Loans [Member]
Recorded investment	17,459	10,478
Residential Portfolio Segment [Member]
Recorded investment	164,982	147,648
Residential Portfolio Segment [Member] | Construction Loans [Member]
Recorded investment	6,665	9,169
Residential Portfolio Segment [Member] | Residential Real Estate Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	357	392
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	29
Recorded investment	138,186	119,331
Residential Portfolio Segment [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	199	202
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Recorded investment	20,131	19,148
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	0	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	209	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	123	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	0	0
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	332	394
Residential Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Recorded investment	0	0
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Construction Loans [Member]
Recorded investment	6,665	9,169
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Residential Real Estate Owner Occupied Loans [Member]
Recorded investment	137,854	118,937
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Recorded investment	20,131	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	12
Recorded investment	32,098	29,650
Consumer Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Recorded investment	130	95
Consumer Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Recorded investment	16	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	146	106
Consumer Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Recorded investment	$ 31,952	$ 29,544