Note 2 - Securities - Amortized Cost and Fair Values of Debt Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Jun. 30, 2024
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	$ 8,646
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	8,615
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	29,037
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	27,827
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	36,871
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	34,574
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	60,025
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	54,111
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis	134,579
Available-for-sale Securities, Debt Maturities, Single Maturity Date	125,127
Total securities available-for-sale	298,808	$ 300,666
Total securities available-for-sale	272,757	264,802
Held-to-maturity Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	43
Held-to-maturity Securities, Debt Maturities, Next Twelve Months, Fair value	43
Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	2,303
Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Fair Value	2,256
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount	3,602
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Fair Value	3,326
Held-to-maturity Securities, Amortized Cost Basis	5,948	6,054
Held-to-maturity Securities, Fair Value	5,625	$ 5,530
U.S. Government-sponsored Mortgage-backed and Related Securities [Member]
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Basis	164,229
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	$ 147,630