Note 15 - Income Taxes (Details Textual) - USD ($)	3 Months Ended
Sep. 30, 2018	Sep. 30, 2017
Unrecognized Tax Benefits, Ending Balance	$ 300,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total	0	$ 0
Income Tax Expense (Benefit), Total	$ 103,748	$ 496,767
Domestic Tax Authority [Member] \| Internal Revenue Service (IRS) [Member]
Open Tax Year	2014 2015 2016 2017 2018

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Tax year that remains open to examination under enacted tax laws, in CCYY format.

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Amount of unrecognized tax benefits.

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Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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