Note 3 - Securities Available For Sale - Available-for-sale Securities at Amortized Cost and Fair Value (Details) - USD ($)	Jun. 30, 2017	Jun. 30, 2016
Gross Unrealized Losses	$ (584,000)	$ (3,000)
Fair Value	95,509,000	95,844,000
Amortized Cost	95,518,000	93,643,000
Gross Unrealized Gains	575,000	2,204,000
US Treasury Securities [Member]
Gross Unrealized Losses
Fair Value	47,721,000	48,774,000
Amortized Cost	47,426,000	47,355,000
Gross Unrealized Gains	295,000	1,419,000
Corporate Debt Securities [Member]
Gross Unrealized Losses		(3,000)
Fair Value	13,171,000	13,385,000
Amortized Cost	13,140,000	13,291,000
Gross Unrealized Gains	31,000	97,000
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Gross Unrealized Losses	(248,000)
Fair Value	25,577,000	32,223,000
Amortized Cost	25,803,000	31,782,000
Gross Unrealized Gains	22,000	441,000
Equity Securities [Member]
Gross Unrealized Losses	(336,000)
Fair Value	7,709,000
Amortized Cost	7,934,000
Gross Unrealized Gains	111,000
Mutual Fund Investments [Member]
Gross Unrealized Losses
Fair Value	1,331,000	1,462,000
Amortized Cost	1,215,000	1,215,000
Gross Unrealized Gains	$ 116,000	$ 247,000