Note 3 - Loans and Allowance for Credit Losses - Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Recorded investment	$ 813,458	$ 759,114
Financing Receivable, Collateral Dependent Loans With An Allowance for Credit Loss	8,470	7,930	$ 7,724
Real Estate [Member]
Recorded investment		189
Other Pledged Collateral [Member]
Recorded investment		257
Collateral Pledged [Member]
Financing Receivable, Collateral Dependent Loans With An Allowance for Credit Loss		67
Residential Portfolio Segment [Member]
Recorded investment	201,602	197,143
Financing Receivable, Collateral Dependent Loans With An Allowance for Credit Loss	2,010	2,018	1,571
Residential Portfolio Segment [Member] \| Real Estate [Member]
Recorded investment	158
Residential Portfolio Segment [Member] \| Other Pledged Collateral [Member]
Recorded investment	0
Residential Portfolio Segment [Member] \| Collateral Pledged [Member]
Financing Receivable, Collateral Dependent Loans With An Allowance for Credit Loss	52
Commercial Portfolio Segment [Member]
Recorded investment	113,513	127,811
Commercial Portfolio Segment [Member] \| Real Estate [Member]
Recorded investment		0
Commercial Portfolio Segment [Member] \| Other Pledged Collateral [Member]
Recorded investment		257
Commercial Portfolio Segment [Member] \| Collateral Pledged [Member]
Financing Receivable, Collateral Dependent Loans With An Allowance for Credit Loss		67
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Collateral Dependent Loans With An Allowance for Credit Loss	$ 3,446	3,650	$ 3,943
Commercial Real Estate Portfolio Segment [Member] \| Real Estate [Member]
Recorded investment		189
Commercial Real Estate Portfolio Segment [Member] \| Other Pledged Collateral [Member]
Recorded investment		0
Commercial Real Estate Portfolio Segment [Member] \| Collateral Pledged [Member]
Financing Receivable, Collateral Dependent Loans With An Allowance for Credit Loss		$ 0