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Note 19 - Major Customers, Suppliers and Related Information - Schedule of Major Customers (Details) - USD ($)
3 Months Ended 6 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2020
Mar. 31, 2019
Revenues $ 8,276,773 $ 10,191,691 $ 17,058,475 $ 20,369,250
Americas [Member]        
Revenues 7,046,654 9,048,167 13,850,474 17,769,488
Asia Pacific [Member]        
Revenues 656,353 506,968 2,204,124 1,146,024
EMEA [Member]        
Revenues $ 573,766 $ 636,556 $ 1,003,877 $ 1,453,738