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Note 11 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)
Dec. 31, 2022
Dec. 31, 2021
NOLs $ 7,495,858 $ 9,122,325
Inventory and other reserves 31,340 24,128
Stock based compensation expense 196,700 296,657
Lease liability 5,883 16,125
Accruals 14,695 7,597
Deferred tax assets, other 96 96
Total deferred tax assets 7,744,572 9,466,928
Depreciation and amortization (668,359) (784,611)
Right-of-use assets (6,112) (16,054)
Valuation allowance (7,778,053) (9,504,575)
Net deferred tax liabilities $ (707,952) $ (838,312)