Note 2 - Securities - Amortized Cost and Fair Values of Debt Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Jun. 30, 2025
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	$ 5,238
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	5,201
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	36,510
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	35,159
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	27,242
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	26,436
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	54,459
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	49,517
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis	123,449
Available-for-sale Securities, Debt Maturities, Single Maturity Date	116,313
Total securities available-for-sale	283,872	$ 302,424
Total securities available-for-sale	262,347	273,875
Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	1,625
Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Fair Value	1,599
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount	3,026
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Fair Value	3,006
Held-to-maturity Securities, Amortized Cost Basis	4,651
Held-to-maturity Securities, Fair Value	4,605	$ 5,026
U.S. Government-sponsored Mortgage-backed and Related Securities [Member]
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Basis	160,423
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	$ 146,034