Note 10 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Domestic Tax Authority [Member]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	$ 17,789,000	$ 14,041,000
Operating Loss Carryforwards	110,819,000
Tax Credit Carryforward, Amount	1,418,000
Foreign Tax Authority [Member]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	799,000	811,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards		$ 45,284,000
Tax Credit Carryforward, Amount	1,437,000
Income Tax Benefit	$ 0
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	34.00%
Deferred Income Tax Expense (Benefit)	$ 0
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	3,484,000
Tax Benefits Related To Stock Options Included In Valuation Allowance	$ 219,000