Note 3 - Securities - Securities With Unrealized and Unrecognized Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jun. 30, 2019
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 8,173
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(25)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	31,023	45,838
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(219)	(510)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	39,196	45,838
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(244)	(510)
US Government-sponsored Enterprises Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	2,668
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(13)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		998
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss		(1)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	2,668	998
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(13)	(1)
US States and Political Subdivisions Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	1,780
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(3)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	209	5,201
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(1)	(33)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,989	5,201
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(4)	(33)
Residential Mortgage Backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	2,558
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(6)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	29,328	36,362
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(203)	(448)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	31,886	36,362
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(209)	(448)
Commercial Mortgage Backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	705
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(2)
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	705
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(2)
Collateralized Debt Obligations [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	462
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	1,486	3,277
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(15)	(28)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,948	3,277
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	$ (16)	$ (28)