Note 14 - Income Taxes (Details Textual) - USD ($)	3 Months Ended		6 Months Ended	9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Unrecognized Tax Benefits, Ending Balance			$ 300,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total			$ 0
Income Tax Expense (Benefit), Total	$ (190,507)	$ 83,898		$ (202,420)	$ 189,608
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