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Note 1 - Summary of Significant Accounting Policies - Net Sales by Geographical Region (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Revenue $ 3,305,534 $ 4,142,954 $ 11,961,062 $ 12,157,394
Reportable Geographical Components [Member] | Americas [Member]        
Revenue 382,573 211,575 861,260 573,365
Reportable Geographical Components [Member] | Asia Pacific [Member]        
Revenue 895,696 636,622 2,944,449 3,225,691
Reportable Geographical Components [Member] | Europe [Member]        
Revenue 1,903,930 3,294,757 6,651,065 8,358,338
Reportable Geographical Components [Member] | Middle East and Africa [Member]        
Revenue $ 123,335 $ 0 $ 1,504,288 $ 0