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Note 3 - Balance Sheet Components - Schedule of Property and Equipment (Details) - USD ($)
Mar. 31, 2025
Dec. 31, 2024
Total property and equipment $ 927,910 $ 911,016
Accumulated depreciation and amortization (777,963) (761,042)
Total property and equipment, net 149,947 149,974
Equipment and Furnishings [Member]    
Total property and equipment 812,305 795,411
Leasehold Improvements [Member]    
Total property and equipment $ 115,605 $ 115,605