Note 2 - Securities - Securities With Unrealized and Unrecognized Losses (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 30, 2017
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 50,514	$ 67,163
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(492)	(795)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	35,940	4,293
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(715)	(72)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	86,454	71,456
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(1,207)	(867)
US Government-sponsored Enterprises Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	9,901	4,336
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(146)	(74)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	9,901	4,336
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(146)	(74)
US States and Political Subdivisions Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	11,862	13,881
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(93)	(241)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	8,179	834
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(190)	(13)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	20,041	14,715
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(283)	(254)
Residential Mortgage Backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	27,316	42,071
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(243)	(391)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	22,415	2,805
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(388)	(47)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	49,731	44,876
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(631)	(438)
Commercial Mortgage Backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	1,435	1,458
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(10)	(1)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,435	1,458
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(10)	(1)
Collateralized Debt Obligations [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		5,417
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss		(88)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	5,346	654
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(137)	(12)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	5,346	6,071
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	$ (137)	$ (100)