Note 11 - Income Taxes - Components of Deferred Income Tax Assets and (Liabilities) (Details) - USD ($)	Jun. 30, 2018	Jun. 30, 2017
Uncertain tax positions	$ 119,000	$ 281,000
Reserves against current assets	1,348,000	584,000
Accrued expenses	2,028,000	3,357,000
Deferred compensation	402,000	925,000
Stock-based compensation	1,296,000	1,824,000
State net operating loss carryover and credits	2,194,000	1,853,000
Long term capital loss carryforward	2,555,000	3,703,000
Goodwill, acquisition costs and intangible assets, deferred tax assets	4,728,000
Goodwill, acquisition costs and intangible assets, deferred tax liabilities		(502,000)
U.S. Federal net operating loss carryover and credits	232,000	406,000
Deferred income tax asset before valuation allowance	14,902,000	12,431,000
Valuation allowance	(4,749,000)	(5,556,000)
Deferred income tax asset	10,153,000	6,875,000
Depreciation	(2,045,000)	(3,515,000)
Deferred income tax liability	(2,045,000)	(3,515,000)
Net deferred income tax asset	$ 8,108,000	$ 3,360,000