Summary Of Level 3 Inputs Measurement On Recurring Basis (Detail) (USD $)
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6 Months Ended | |||
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Jul. 31, 2012
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Fair Value, Measurement Inputs, Disclosure [Line Items] | ||||
Beginning Balance | $ 773,026 | |||
Additions | ||||
Exercises | ||||
Adjustment resulting from change in fair value recognized in earnings | 2,790,711 | [1] | ||
Ending Balance | 3,563,737 | |||
Derivative
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Fair Value, Measurement Inputs, Disclosure [Line Items] | ||||
Beginning Balance | 653,026 | |||
Additions | ||||
Exercises | ||||
Adjustment resulting from change in fair value recognized in earnings | 2,456,126 | [1] | ||
Ending Balance | 3,109,152 | |||
Warrant
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Fair Value, Measurement Inputs, Disclosure [Line Items] | ||||
Beginning Balance | 120,000 | |||
Additions | ||||
Exercises | ||||
Adjustment resulting from change in fair value recognized in earnings | 334,585 | [1] | ||
Ending Balance | $ 454,585 | |||
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