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Note T - Income Taxes - Components of Deferred Taxes (Details) - USD ($)
Dec. 31, 2021
Dec. 31, 2020
Accrued compensation $ 135,000 $ 81,000
Accounts receivable allowance 75,000 474,000
Stock-based compensation 1,149,000 1,073,000
Basis differences in fixed assets (10,000) (14,000)
Basis differences in intangible assets 75,000 65,000
Net operating loss and credit carryforwards 14,467,000 13,337,000
Valuation allowances $ (15,891,000) $ (15,016,000)