Note 3 - Securities - Securities With Unrealized and Unrecognized Losses (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Jun. 30, 2022
Obligations of U.S. government-sponsored entities and agencies	$ 42,390	$ 245,869
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(1,076)	(23,144)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	228,398	29,788
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(36,939)	(4,981)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	270,788	275,657
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(38,015)	(28,125)
US Treasury Securities [Member]
Obligations of U.S. government-sponsored entities and agencies	0	8,447
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	0	(462)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	8,408	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(533)	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	8,408	8,447
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(533)	(462)
US States and Political Subdivisions Debt Securities [Member]
Obligations of U.S. government-sponsored entities and agencies	16,009	80,445
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(344)	(8,331)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	62,492	2,047
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(8,638)	(418)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	78,501	82,492
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(8,982)	(8,749)
Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	0	3,522
Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	0	(90)
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	6,294	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Aggregate Loss	(676)	0
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Fair Value	6,294	3,522
Debt Securities, Held-to-Maturity, Unrealized Loss Position, Accumulated Loss	(676)	(90)
US Government-sponsored Enterprises Debt Securities [Member]
Obligations of U.S. government-sponsored entities and agencies	1,008	26,265
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(10)	(2,424)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	23,551	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(3,735)	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	24,559	26,265
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(3,745)	(2,424)
Residential Mortgage-Backed Securities [Member]
Obligations of U.S. government-sponsored entities and agencies	3,334	76,526
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(84)	(7,586)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	85,096	24,569
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(14,982)	(4,056)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	88,430	101,095
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(15,066)	(11,642)
Commercial Mortgage-Backed Securities [Member]
Obligations of U.S. government-sponsored entities and agencies	0	7,301
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	0	(1,322)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	6,795	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(1,809)	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	6,795	7,301
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(1,809)	(1,322)
Collateralized Debt Obligations [Member]
Obligations of U.S. government-sponsored entities and agencies	22,039	30,729
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(638)	(2,308)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	27,023	2,713
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(5,100)	(466)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	49,062	33,442
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(5,738)	(2,774)
Other Debt Obligations [Member]
Obligations of U.S. government-sponsored entities and agencies	0	16,156
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	0	(711)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	15,033	459
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(2,142)	(41)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	15,033	16,615
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	$ (2,142)	$ (752)