Note 2 - Securities - Securities with Unrealized and Unrecognized Losses (Details) - USD ($)	3 Months Ended	12 Months Ended
	Sep. 30, 2016	Jun. 30, 2016
US States and Political Subdivisions Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 2,018,000	$ 572,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(6,000)	(6,000)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	275,000	641,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(3,000)	(2,000)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	2,293,000	1,213,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(9,000)	(8,000)
Residential Mortgage Backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	7,573,000	4,899,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(15,000)	(12,000)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	3,427,000	4,836,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(18,000)	(14,000)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	11,000,000	9,735,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(33,000)	(26,000)
Collateralized Mortgage 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	1,103
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	1,103
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(1)
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		1,212,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss		(3,000)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		1,212,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss		(3,000)
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	9,591,000	5,471,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(21,000)	(18,000)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	4,805,000	6,689,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(22,000)	(19,000)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	14,396,000	12,160,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	$ (43,000)	$ (37,000)