Note 9 - Fair Value Measurements (Detail) - Significant Weighted Average Assumptions	3 Months Ended
Apr. 30, 2013
Outstanding and Contingent Warrants [Member]
Risk free interest rate	1.16%
Average expected life	7 years 87 days
Expected volatility	109.72%
Derivative Financial Instruments, Liabilities [Member]
Risk free interest rate	0.17%
Average expected life	1 year 215 days
Expected volatility	172.57%

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

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- Definition

Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

+ References

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- Definition

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

+ References

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