Note 3 - Securities - Amortized Cost and Fair Values of Debt Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Jun. 30, 2022
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	$ 2,747
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	2,705
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	31,708
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	30,013
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	52,323
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	46,902
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	73,277
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	64,447
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis	160,055
Available-for-sale Securities, Debt Maturities, Single Maturity Date	144,067
Total securities available-for-sale	325,820	$ 324,329
Total securities available-for-sale	287,142	296,347
Due after one year through five years, Net Carrying Amount	171
Due after one year through five years, Fair Value	169
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount	3,289
Held-to-maturity Securities, Debt Maturities, Year Six Through Ten, Fair Value	3,182
Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount	3,878
Held-to-maturity Securities, Debt Maturities, after Ten Years, Fair Value	3,560
Held-to-maturity Securities	7,338	7,874
Held-to-maturity Securities, Fair Value	6,911	$ 7,831
U.S. Government-sponsored Mortgage-backed and Related Securities [Member]
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Basis	165,765
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	$ 143,075