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Note Q - Components of Deferred Taxes (Details) - USD ($) | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Current asset: |  |
Accrued compensation | $ 75,000 | $ 88,000
Accounts receivable allowance | 5,000 | 8,000
Stock-based compensation | 258,000 | 174,000
Basis differences in fixed assets | (16,000) | (26,000)
Basis differences in intangible assets | 55,000 | (63,000)
Net operating loss and credit carryforwards | 17,994,000 | 17,540,000
Valuation allowances | $ (18,372,000) | $ (17,721,000)

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