Note 11 - Income Taxes - Components of Deferred Income Tax Assets and (Liabilities) (Details) - USD ($)	Jun. 30, 2017	Jun. 30, 2016
Uncertain tax positions	$ 281,000
Reserves against current assets	584,000	679,000
Accrued expenses	3,357,000	3,690,000
Deferred compensation	925,000	842,000
Stock-based compensation	1,824,000	1,473,000
State net operating loss carryover and credits	1,853,000	1,878,000
Deferred Tax Assets, Capital Loss Carryforwards	3,703,000	4,272,000
U.S. Federal net operating loss carryover and credits	406,000	456,000
Deferred income tax asset before valuation reserve	12,933,000	13,290,000
Valuation reserve	(5,556,000)	(6,150,000)
Deferred income tax asset	7,377,000	7,140,000
Depreciation	(3,515,000)	(4,270,000)
Goodwill, acquisition costs and intangible assets	(502,000)	(289,000)
Deferred income tax liability	(4,017,000)	(4,559,000)
Net deferred income tax asset	$ 3,360,000	$ 2,581,000