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Note 4 - Accounts Receivable - Schedule of Receivables (Details) - USD ($)
Jun. 30, 2022
Dec. 31, 2021
Allowance for doubtful accounts $ (117,162) $ (121,022)
Accounts receivable, net 6,485,828 4,468,863
Trade Accounts Receivable [Member]    
Accounts receivable, gross 5,392,108 3,688,116
Premium [Member]    
Accounts receivable, gross $ 1,210,882 $ 901,769