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Note 5 - Stockholders' Equity (Details) - Derivative Liability Valuation Model Assumptions
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3 Months Ended | ||||||
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Dec. 31, 2012
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Mar. 31, 2012
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Jan. 31, 2012
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Mar. 31, 2013
Minimum [Member]
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Jan. 31, 2012
Minimum [Member]
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Mar. 31, 2013
Maximum [Member]
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Jan. 31, 2012
Maximum [Member]
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| Note 5 - Stockholders' Equity (Details) - Derivative Liability Valuation Model Assumptions [Line Items] | |||||||
| Dividend yield | 0.00% | 0.00% | 0.00% | ||||
| Expected volatility | 47.08% | 46.59% | 47.08% | 100.00% | 100.00% | ||
| Risk free interest rate | 0.65% | 0.91% | 0.61% | 0.75% | |||
| Expected remaining term (in years) | 4 years 186 days | 5 years | 4 years 94 days | 4 years 299 days | |||
| X | ||||||||||
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- Details
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| 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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