Note 2 - Securities - Amortized Cost and Fair Values of Debt Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Jun. 30, 2024
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	$ 6,841
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	6,760
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	27,390
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	25,905
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	36,858
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	34,282
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	58,807
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	51,098
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis	129,896
Available-for-sale Securities, Debt Maturities, Single Maturity Date	118,045
Total securities available-for-sale	303,151	$ 300,666
Total securities available-for-sale	269,905	264,802
Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	1,969
Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Fair Value	1,891
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount	3,535
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Fair Value	3,403
Held-to-maturity Securities, Amortized Cost Basis	5,504	6,054
Held-to-maturity Securities, Fair Value	5,294	$ 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	173,255
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	$ 151,860