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Note 4 - Accounts Receivable - Summary of Accounts Receivable (Details) - USD ($)
Jun. 30, 2025
Dec. 31, 2024
Accounts receivable $ 1,366,787 $ 1,351,482
Allowance for credit losses (383,253) (633,253)
Accounts receivable, net of allowances for credit losses $ 983,534 $ 718,229