Note 2 - Securities - Securities with Unrealized and Unrecognized Losses (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	$ 71,456	$ 12,160
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(867)	(37)
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	67,163	5,471
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(795)	(18)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	4,293	6,689
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(72)	(19)
US Government-sponsored Enterprises Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	4,336
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(74)
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	4,336
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(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
US States and Political Subdivisions Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	14,715	1,213
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(254)	(8)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	933
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Unrealized Loss	(3)
Held-to-maturity Securities, Continuous Unrealized Loss Position, More than Twelve Months, Fair Value
Held-to-maturity Securities, Continuous Unrealized Loss Position, More than Twelve Months, Unrealized Loss
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	933
Held-to-maturity Securities, Continuous Unrealized Loss Position, Unrealized Loss	(3)
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	13,881	572
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(241)	(6)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	834	641
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(13)	(2)
Residential Mortgage Backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	44,876	9,735
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(438)	(26)
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	42,071	4,899
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(391)	(12)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	2,805	4,836
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(47)	(14)
Collateralized Debt Obligations [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		1,212
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss		(3)
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		1,212
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss		$ (3)
Commercial Mortgage Backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,458
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(1)
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	1,458
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(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
Collateralized Mortgage Obligations [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	6,071
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(100)
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	654
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	$ (12)