Note 6- Stockholders' Equity (Detail) - (Table 2) Fair Value Assumptions, Warrants	3 Months Ended
Mar. 31, 2013
Stockholders Equity Note [Line Items]
Annualized volatility	72.30%
Minimum
Stockholders Equity Note [Line Items]
Risk free interest rate	0.36%
Expected term	3 years
Maximum
Stockholders Equity Note [Line Items]
Risk free interest rate	0.84%
Expected term	5 years

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

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- Definition

Risk-free interest rate assumption used in valuing an instrument.

+ References

+ Details

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- Definition

Weighted average expected volatility of stock price.

+ References

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