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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

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