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Note 8 - Income Taxes (Details) - Deferred Income Taxes (USD $)
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Dec. 31, 2014
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Dec. 31, 2013
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| Deferred income tax assets (liabilities): | ||
| Property and equipment | $ (79,190)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment | $ (153,864)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment |
| Deferred revenue | 38,989us-gaap_DeferredTaxAssetsDeferredIncome | 40,564us-gaap_DeferredTaxAssetsDeferredIncome |
| Accrued expenses | 50,613us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities | 223,022us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities |
| Share based compensation related | 1,738,280us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost | 1,554,048us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost |
| Other | 334,217us-gaap_DeferredTaxAssetsOther | 208,266us-gaap_DeferredTaxAssetsOther |
| Net operating loss carryforwards | 24,125,719us-gaap_DeferredTaxAssetsOperatingLossCarryforwards | 23,089,111us-gaap_DeferredTaxAssetsOperatingLossCarryforwards |
| 26,208,628us-gaap_DeferredTaxAssetsGross | 24,961,147us-gaap_DeferredTaxAssetsGross | |
| Less valuation allowance | $ (26,208,628)us-gaap_DeferredTaxAssetsValuationAllowance | $ (24,961,147)us-gaap_DeferredTaxAssetsValuationAllowance |
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from deferred income. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences not separately disclosed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from accrued liabilities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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