Note 8 - Components of Company's Deferred Tax Assets and Liabilities for Federal and State Income Taxes (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014
Deferred tax assets:
Net operating loss carryforwards	$ 38,317	$ 34,154
Income tax credit carryforwards	2,143	1,995
Stock compensation	916
Other	1,479	1,750
Valuation allowance	(42,408)	(37,317)
Total deferred taxes	447	582
Deferred tax liabilities
Depreciation and amortization	(8,088)	(8,223)
Net deferred taxes and liabilities	$ (7,641)	$ (7,641)