Note 2 - Securities - Securities With Unrealized and Unrecognized Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 859	$ 71,628
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(3)	(1,191)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	69,442	45,259
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(1,270)	(1,787)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	70,301	116,887
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(1,273)	(2,978)
US Government-sponsored Enterprises Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		12,400
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss		(224)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	11,897	2,747
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(122)	(148)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	11,897	15,147
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(122)	(372)
US States and Political Subdivisions Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		26,775
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss		(369)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	12,850	7,975
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(183)	(344)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	12,850	34,750
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(183)	(713)
Residential Mortgage Backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	859	31,038
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(3)	(581)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	40,422	29,716
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(864)	(1,079)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	41,281	60,754
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(867)	(1,660)
Commercial Mortgage Backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		1,415
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss		(17)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	1,731
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(50)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,731	1,415
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(50)	(17)
Collateralized Debt Obligations [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	2,542	4,821
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(51)	(216)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	2,542	4,821
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	$ (51)	$ (216)