Note 15 - Income Taxes (Details Textual) - USD ($)	3 Months Ended	9 Months Ended
Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Unrecognized Tax Benefits, Ending Balance	$ 300,000		$ 300,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total	0	$ 0	0	$ 0
Income Tax Expense (Benefit), Total	$ 83,898	$ 23,087	$ 189,608	$ 1,134,422
Domestic Tax Authority [Member] \| Internal Revenue Service (IRS) [Member]
Open Tax Year			2014 2015 2016 2017 2018
Foreign Tax Authority [Member] \| Canada Revenue Agency [Member]
Open Tax Year			2014 2015 2016 2017 2018
Foreign Tax Authority [Member] \| New Zealand Revenue Agency [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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