Note 13 - Stock Option and Incentive Plan (Details) - Valuation Assumptions of Stock Options |
12 Months Ended | |
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Dec. 31, 2014 |
Dec. 31, 2013 |
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| Valuation Assumptions of Stock Options [Abstract] | ||
| Weighted-average volatility | 185.00% | 105.50% |
| Expected dividends | 0.00% | 0.00% |
| Expected life (in years) | 3 years 6 months | 2 years |
| Weighted-average risk-free interest rate | 1.10% | 0.30% |
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Weighted average expected volatility rate of share-based compensation awards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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