Note 3 - Available-for-sale Securities at Amortized Cost and Fair Value (Details) - USD ($)	Jun. 30, 2016	Jun. 30, 2015
US Treasury Securities [Member]
Amortized Cost	$ 47,355,000	$ 47,286,000
Gross Unrealized Gains	1,419,000	484,000
Gross Unrealized Losses
Securities available-for-sale	48,774,000	47,770,000
Corporate Debt Securities [Member]
Amortized Cost	13,291,000	13,165,000
Gross Unrealized Gains	97,000	18,000
Gross Unrealized Losses	(3,000)	(31,000)
Securities available-for-sale	13,385,000	13,152,000
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Amortized Cost	31,782,000	18,765,000
Gross Unrealized Gains	441,000	53,000
Gross Unrealized Losses		(149,000)
Securities available-for-sale	32,223,000	18,669,000
Municipal Bonds [Member]
Amortized Cost		406,000
Gross Unrealized Gains		6,000
Gross Unrealized Losses
Securities available-for-sale		412,000
Mutual Fund Investments [Member]
Amortized Cost		1,215,000
Gross Unrealized Gains
Gross Unrealized Losses		(6,000)
Securities available-for-sale		1,209,000
Mutual Fund Investments [Member]
Amortized Cost	1,215,000
Gross Unrealized Gains	247,000
Gross Unrealized Losses
Securities available-for-sale	1,462,000
Amortized Cost	93,643,000	80,837,000
Gross Unrealized Gains	2,204,000	561,000
Gross Unrealized Losses	(3,000)	(186,000)
Securities available-for-sale	$ 95,844,000	$ 81,212,000