Note 2 - Securities - Securities with Unrealized and Unrecognized Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Jun. 30, 2017
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 67,170	$ 67,163
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(671)	(795)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	5,723	4,293
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(79)	(72)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	72,893	71,456
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(750)	(867)
US Government-sponsored Enterprises Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	3,921	4,336
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(73)	(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	3,921	4,336
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(73)	(74)
US States and Political Subdivisions Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	12,984	13,881
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(198)	(241)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	1,740	834
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(19)	(13)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	14,724	14,715
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(217)	(254)
Residential Mortgage Backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	43,781	42,071
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(307)	(391)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	3,381	2,805
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(49)	(47)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	47,162	44,876
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(356)	(438)
Commercial Mortgage Backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	1,448	1,458
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(4)	(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	1,448	1,458
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(4)	(1)
Collateralized Debt Obligations [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	5,036	5,417
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(89)	(88)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	602	654
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(11)	(12)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	5,638	6,071
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	$ (100)	$ (100)