Note 16 - Income Taxes (Details) - Deferred Tax Assets and Liabilities - USD ($) |
Dec. 31, 2014 |
Dec. 31, 2013 |
|---|---|---|
| Deferred tax assets: | ||
| Net operating loss and credit carryforwards | $ 30,227,000 | $ 29,431,000 |
| Stock-based compensation | 1,199,000 | 1,193,000 |
| Stock-based compensation | 422,000 | 558,000 |
| Basis difference for fixed assets and intangibles | 158,000 | 174,000 |
| Total gross deferred tax assets | 32,006,000 | 31,356,000 |
| Valuation allowance | (32,006,000) | (31,356,000) |
| Net deferred tax assets | $ 0 | $ 0 |
| X | ||||||||||
- 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 | ||||||||||
- Definition Amount after 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 | ||||||||||
- 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 | ||||||||||
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from property, plant, and equipment. No definition available.
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| X | ||||||||||
- 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 | ||||||||||
- 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 | ||||||||||
- 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 | ||||||||||
- References No definition available.
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