Note 3 - Securities Available For Sale (Details Textual) - USD ($)	1 Months Ended	12 Months Ended
	Sep. 30, 2014	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax		$ 584,000	$ 3,000
Available-for-sale Securities, Gross Realized Gains			23,000	$ 572,000
Proceeds from Sale of Available-for-sale Securities			4,800,000	994,000
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities				$ 91,000
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held		0	0
Mutual Fund Investments [Member]
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities	$ 91,000
Reduction in Dividend from Mutual Fund Investment, Percentage	11.00%
Early Call Provision of a Corporate Bond [Member]
Available-for-sale Securities Pledged as Collateral		$ 73,200,000	$ 79,100,000