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Warrants Outstanding (Detail) (USD $)
 12 Months Ended
Jan. 31, 2013
Jan. 31, 2012
Class of Warrant or Right [Line Items]    
Aggregate intrinsic value , warrants outstanding, beginning balance $ 0 $ 0
Aggregate intrinsic value, warrants granted 0  
Aggregate intrinsic value, warrants exercised 0  
Aggregate intrinsic value, warrants lapsed\Cancelled 0 0
Aggregate intrinsic value, warrants outstanding, ending balance $ 0  
Number of warrants outstanding, beginning balance 1,500,000 1,655,333
Number of warrants granted 2,936,000  
Number of warrants exercised 0  
Number of warrants lapsed\Cancelled (1,500,000) (155,333)
Number of warrants outstanding, ending balance 2,936,000 1,500,000