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Note 4 - Accounts Receivable - Schedule of Receivables (Details) - USD ($) | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Allowance for doubtful accounts | $ (70,627) | $ (111,379)
Accounts receivable, net | 6,385,096 | 5,831,366
Trade Accounts Receivable [Member] |  |
Accounts receivable, gross | 4,697,380 | 4,798,827
Premium [Member] |  |
Accounts receivable, gross | $ 1,758,343 | $ 1,143,918

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