Note 2 - Securities - Amortized Cost and Fair Values of Debt Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Jun. 30, 2025
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	$ 4,285
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	4,261
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	37,250
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	35,753
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	23,867
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	22,834
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	55,697
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	49,736
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis	121,099
Available-for-sale Securities, Debt Maturities, Single Maturity Date	112,584
Total securities available-for-sale	281,802	$ 302,424
Total securities available-for-sale	258,371	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	1,598
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	2,958
Held-to-maturity Securities, Amortized Cost Basis	4,651
Held-to-maturity Securities, Fair Value	4,556	$ 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	160,703
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	$ 145,787