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Note 6 - Long-term Debt - Schedule of Convertible Note Payable (Details) - Convertible Debt [Member] - USD ($)
Sep. 30, 2023
Dec. 31, 2022
Convertible note $ 0 $ 0
Less: unamortized debt issuance costs 0 0
Convertible note payable 0 0
Current portion of convertible note payable 0 0
Convertible note payable, less current portion $ 0 $ 0