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Note 8 - Goodwill and Intangible Assets (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Goodwill, Impairment Loss $ 0      
Goodwill and Intangible Assets, Foreign Currency Translation Gain (Loss)     $ 96,015  
Amortization of Intangible Assets, Total $ 74,049 $ 75,354 $ 223,042 $ 228,793