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Note 16 - Income Taxes (Details) - Deferred Tax Assets and Liabilities (USD $)
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Dec. 31, 2013
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Dec. 31, 2012
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|---|---|---|
| Deferred Tax Assets and Liabilities [Abstract] | ||
| Net operating loss and credit carryforwards | $ 29,431,000 | $ 27,874,000 |
| Stock-based compensation | 1,193,000 | 1,190,000 |
| Accruals | 558,000 | 976,000 |
| Basis difference for fixed assets and intangibles | 174,000 | 190,000 |
| Total gross deferred tax assets | 31,356,000 | 30,230,000 |
| Valuation allowance | $ (31,356,000) | $ (30,230,000) |