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Note 12 - Income Taxes - Reconciliation of Income Tax Expenses (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
U.S. federal blended income tax rate 28.00% 35.00% 35.00%
Expected income tax benefit $ (1,878) $ (2,157) $ (1,649)
Meals and entertainment 21 17 7
Non-deductible penalties 4 16 21
Warrant derivative liability (9) (54)
Share-based compensation 10
Impact on the change in income tax rate 9,556
Change in valuation allowance (7,703) 2,123 1,675
Income tax expense (benefit) $ 0 $ 0 $ 0