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Note O - Income Taxes (Details) - Components of Deferred Taxes (USD $) | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Current asset: |  |
Accrued compensation | $ 49,000 | $ 128,000
Accounts receivable allowance | 8,000 | 8,000
Non-current asset (liability): |  |
Stock-based compensation | 205,000 | 336,000
Basis differences in fixed assets | (19,000) | (10,000)
Basis differences in intangible assets | (69,000) | (77,000)
Net operating loss and credit carryforwards | 17,217,000 | 16,143,000
Valuation allowances | $ (17,391,000) | $ (16,528,000)

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