Note 2 - Securities - Securities With Unrealized and Unrecognized Losses (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Jun. 30, 2018
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 30,914	$ 71,628
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(195)	(1,191)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	72,619	45,259
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(2,144)	(1,787)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	103,533	116,887
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(2,339)	(2,978)
US Government-sponsored Enterprises Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	3,485	12,400
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(18)	(224)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	9,658	2,747
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(223)	(148)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	13,143	15,147
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(241)	(372)
US States and Political Subdivisions Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	14,081	26,775
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(105)	(369)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	16,076	7,975
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(439)	(344)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	30,157	34,750
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(544)	(713)
Residential Mortgage Backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	13,348	31,038
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(72)	(581)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	40,944	29,716
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(1,320)	(1,079)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	54,292	60,754
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(1,392)	(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	1,406
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(12)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,406	1,415
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(12)	(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	4,535	4,821
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(150)	(216)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	4,535	4,821
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	$ (150)	$ (216)