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Note 7 - Intangible Assets - Amortizable (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Amortization of Intangible Assets, Total $ 1,584,580 $ 953,450 $ 3,169,161 $ 1,528,567
Minimum [Member]        
Finite-Lived Intangible Asset, Period before Next Renewal or Extension (Year)     1 year  
Maximum [Member]        
Finite-Lived Intangible Asset, Period before Next Renewal or Extension (Year)     20 years