Note N - Income Taxes (Details) - Components of Deferred Taxes (USD $)	Dec. 31, 2014	Dec. 31, 2013
Current asset:
Accrued compensation	$ 88,000	$ 49,000
Accounts receivable allowance	8,000	8,000
Stock-based compensation	174,000	205,000
Basis differences in fixed assets	(26,000)	(19,000)
Basis differences in intangible assets	(63,000)	(69,000)
Net operating loss and credit carryforwards	17,540,000	17,217,000
Valuation allowances	(17,721,000)	(17,391,000)
	$ 0us-gaap_DeferredTaxAssetsLiabilitiesNet	$ 0us-gaap_DeferredTaxAssetsLiabilitiesNet

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from compensation and benefits costs.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from the allowance for doubtful accounts.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment.

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