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Description Of Business - Additional Information (Detail) (Private Placement, 9% Senior Subordinated Callable Convertible Promissory Notes, USD $)
 12 Months Ended
Jan. 31, 2013
Private Placement | 9% Senior Subordinated Callable Convertible Promissory Notes
  
Description Of Business [Line Items]  
Debt, face amount $ 880,000
Debt, maturity date Feb. 15, 2016
Debt, interest rate 9.00%
Convertible notes payable, interest payment terms The 9% Notes bear interest at a rate of 9% per annum, payable semi-annually on August 15 and February 15.
Net proceeds after debt issuance costs $ 776,000