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Note 1 - Summary of Significant Accounting Policies - Net Sales by Geographical Region (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Revenue $ 5,018,292 $ 4,016,563 $ 8,655,528 $ 8,014,440
Reportable Geographical Components [Member] | Americas [Member]        
Revenue 339,380 196,207 478,688 361,795
Reportable Geographical Components [Member] | Asia Pacific [Member]        
Revenue 1,213,389 1,459,032 2,048,753 2,589,068
Reportable Geographical Components [Member] | Europe [Member]        
Revenue 2,084,570 2,361,324 4,747,134 5,063,577
Reportable Geographical Components [Member] | Middle East and Africa [Member]        
Revenue $ 1,380,953 $ 0 $ 1,380,953 $ 0