Note 2 - Securities - Amortized Cost and Fair Values of Debt Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Jun. 30, 2025
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	$ 8,818
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	8,762
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	38,481
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	37,059
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	27,619
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	26,536
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	52,761
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	46,355
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis	127,679
Available-for-sale Securities, Debt Maturities, Single Maturity Date	118,712
Total securities available-for-sale	293,274	$ 302,424
Total securities available-for-sale	268,900	273,875
Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	2,032
Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Fair Value	2,000
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	3,011
Held-to-maturity Securities, Amortized Cost Basis	5,058
Held-to-maturity Securities, Fair Value	5,011	$ 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	165,595
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	$ 150,188