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Note 8 - Long-term Debt - Notes Payable (Details) - Senior Promissory Notes [Member] - USD ($)	Jun. 30, 2025	Dec. 31, 2024
Senior promissory notes	$ 6,000,000	$ 6,000,000
Less: unamortized debt discount	(664,089)	(696,437)
Senior Promissory Notes payable	5,335,911	5,303,563
Current portion of senior promissory notes payable	0	0
Senior promissory notes payable, less current portion	$ 5,335,911	$ 5,303,563

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