Note 3 - Securities - Amortized Cost and Fair Values of Debt Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	$ 1,851
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	1,821
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	32,354
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	30,568
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	54,329
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	48,751
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	72,862
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	60,331
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis	161,396
Available-for-sale Securities, Debt Maturities, Single Maturity Date	141,471
Total securities available-for-sale	322,529	$ 324,329
Total securities available-for-sale	278,418	296,347
Due after one year through five years, Net Carrying Amount	212
Due after one year through five years, Fair Value	209
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount	4,212
Held-to-maturity Securities, Debt Maturities, Year Six Through Ten, Fair Value	3,454
Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount	3,345
Held-to-maturity Securities, Debt Maturities, after Ten Years, Fair Value	3,459
Held-to-maturity Securities	7,769	7,874
Held-to-maturity Securities, Fair Value	7,122	$ 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	161,133
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	$ 136,947