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Note 5 - Stockholders' Equity (Detail) - Derivative Liability Valuation Model Assumptions (USD $)
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3 Months Ended | |
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Mar. 31, 2013
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Mar. 31, 2012
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| Dividend yield | 0.00% | 0.00% |
| Expected volatility | 100.00% | 100.00% |
| Risk free interest rate | 0.28% | 0.25% |
| Expected remaining term (years) | 5 years | 4 years 302 days |
| Common stock price (in Dollars per share) | $ 1.58 | $ 1.21 |
| X | ||||||||||
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- Definition
Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Period the instrument, asset or liability is expected to be outstanding, 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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| X | ||||||||||
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- Definition
Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Risk-free interest rate assumption used in valuing an instrument. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Price of a single share of a number of saleable stocks of a company. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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