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Stock Option Activity (Detail) (USD $) | 12 Months Ended
--- | ---
Jan. 31, 2014 | Jan. 31, 2013 | Jan. 31, 2012
Shares |  |  |
Beginning balance | 5,300,000 | 1,150,000 |
Granted | 3,085,000 | 4,225,000 |
Cancelled | (1,020,250) |  |
Exercised | 0 | (75,000) |
Expired | 0 | 0 |
Forfeited | (6,750) | 0 |
Ending balance | 7,358,000 | 5,300,000 | 1,150,000
Vested and exercisable | 6,066,890 |  |
Weighted Average Per Share Exercise Price |  |  |
Beginning balance | $ 0.18 | $ 0.15 |
Granted | $ 0.18 | $ 0.19 |
Cancelled | $ 0.22 |  |
Exercised | $ 0 | $ 0.21 |
Expired | $ 0 | $ 0 |
Forfeited | $ 0.79 | $ 0 |
Ending balance | $ 0.17 | $ 0.18 | $ 0.15
Vested and exercisable | $ 0.16 |  |
Weighted Average Remaining Life (Years) |  |  |
Balance | 9 years | 9 years 1 month 6 days | 8 years 10 months 24 days
Granted | 9 years 4 months 24 days | 9 years 2 months 12 days |
Cancelled | 8 years 7 months 6 days |  |
Exercised | 0 years | 0 years |
Expired | 0 years | 0 years |
Forfeited | 9 years | 0 years |
Vested and exercisable | 9 years 1 month 6 days |  |
Aggregate Intrinsic Value |  |  |
Beginning Balance | $ 0 | $ 0 |
Granted | 0 | 0 |
Cancelled | 0 |  |
Exercised | 0 | 0 |
Expired | 0 | 0 |
Forfeited | 0 | 0 |
Ending balance | 0 | 0 | 0
Vested and exercisable | $ 0 |  |

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- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, 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 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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