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Closing Stock Price at Transaction Date and Inputs to Black-Scholes Option Pricing (Detail) (USD $) | 3 Months Ended |  |  |  | 12 Months Ended |  | 12 Months Ended |
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Oct. 31, 2013 | Jul. 31, 2013 | Apr. 30, 2013 | Jan. 31, 2014 | Oct. 29, 2012 | Jan. 31, 2012 | Jan. 31, 2014 Warrants | Jan. 31, 2014 Placement Agent Warrants [Member] | Jan. 31, 2013 Placement Agent Warrants [Member] | Jan. 31, 2014 Note Warrant [Member] | Jan. 31, 2013 Note Warrant [Member]
Schedule Of Class Of Right Or Warrant Fair Value Assumption [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fair value of 9% Notes warrants |  |  |  |  |  |  |  | $ 54,468 |  | $ 186,897 |
Exercise Price |  |  |  | 0.125 | 0.11485 | 0.11485 | 0.42 | 0.40 | 0.40 | 0.45 | 0.45
Expected Term (in years) | 6 years | 3 years | 4 years 7 months 2 days |  |  |  | 5 years | 5 years |  | 5 years |
Volatility | 67.20% | 29.70% | 26.00% |  |  |  | 48.00% | 36.70% |  | 36.70% |
Dividend rate | 0.00% | 0.00% | 0.00% |  |  |  | 0.00% | 0.00% |  | 0.00% |
Interest rate | 1.40% | 0.60% | 0.50% |  |  |  | 0.70% | 0.70% |  | 0.70% |

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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph i -Subparagraph 4 -Article 4 + Details
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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). + 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=25499696&loc=d3e19207-110258 + Details
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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. + 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=25499696&loc=d3e19207-110258 + Details
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- Definition Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price. + 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=25499696&loc=d3e19207-110258 + Details
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- Definition Risk-free interest rate assumption used in valuing an instrument. + 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=25499696&loc=d3e19207-110258 + Details
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- Definition Fair value portion of warrants not settleable in cash classified as equity. + 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 (a) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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