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Note 3 - Balance Sheet Components - Schedule of Property and Equipment (Details) - USD ($)
Jun. 30, 2026
Dec. 31, 2025
Accumulated depreciation and amortization $ (427,759) $ (403,607)
Total property and equipment, net 84,678 108,830
Equipment and Furnishings [Member]    
Total property and equipment $ 512,437 $ 512,437