Note 3 - Property and Equipment, Net - Components of Property and Equipment, Net (Details) - USD ($)	Sep. 30, 2024	Dec. 31, 2023
Total property and equipment	$ 927,860	$ 694,645
Less accumulated depreciation	(486,132)	(373,958)
Net property and equipment	441,728	320,687
Furniture and Fixtures [Member]
Total property and equipment	70,136	56,646
Leasehold Improvements [Member]
Total property and equipment	188,824	136,847
Machinery and Equipment [Member]
Total property and equipment	272,775	172,527
Vehicles [Member]
Total property and equipment	365,440	297,940
Test/Demo Vehicles [Member]
Total property and equipment	$ 30,685	$ 30,685