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Note L - Income Taxes - Deferred Tax Assets (Details) - USD ($) | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Allowance for Doubtful Accounts | $ 2,000 | $ 2,000
Warranty Reserve | 3,000 | 5,000
Impaired Assets |  | 0
Inventory Reserve | 108,000 | 110,000
Deferred Officer's Compensation | 439,000 | 816,000
Depreciation and Amortization | (52,000) | (67,000)
Net Operating Loss Carryforwards | 18,895,000 | 17,993,000
Tax Credits | 660,000 | 416,000
Other | 45,000 | 10,000
Subtotal | 20,100,000 | 19,285,000
Valuation allowance | (20,100,000) | (19,285,000)
Non-current deferred tax asset | $ 0 | $ 0

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