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Note P - Income Taxes (Detail) - Components of Deferred Taxes (USD $) | Dec. 31, 2012 | Dec. 31, 2011
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Current asset: |  |
Accrued compensation | $ 128,000 | $ 119,000
Accounts receivable allowance | 8,000 | 156,000
Non-current asset (liability): |  |
Stock-based compensation | 336,000 |
Basis differences in fixed assets | (10,000) | (21,000)
Basis differences in intangible assets | (77,000) | 31,000
Net operating loss carryforwards | 16,143,000 | 15,912,000
Valuation allowances | $ (16,528,000) | $ (16,197,000)

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