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Note 3 - Balance Sheet Components - Schedule of Property and Equipment - 10Q (Details) - USD ($)
Mar. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Total property and equipment $ 927,910 $ 911,016 $ 890,363
Accumulated depreciation and amortization (777,963) (761,042) (680,674)
Total property and equipment, net 149,947 149,974 209,689
Equipment and Furnishings [Member]      
Total property and equipment 812,305 795,411 774,758
Leasehold Improvements [Member]      
Total property and equipment $ 115,605 $ 115,605 $ 115,605