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Summary of Stock-Based Compensation Expense Related To Restricted Stock and Option Awards (Detail) (USD $)
12 Months Ended
Jan. 31, 2013
Jan. 31, 2012
Summary Of Stock Based Compensation Expense Related To Restricted Stock and Option Awards [Line Items]    
Stock-based compensation expense $ 2,061,728 $ 181,733
Cost of services
   
Summary Of Stock Based Compensation Expense Related To Restricted Stock and Option Awards [Line Items]    
Stock-based compensation expense 550,710 29,333
General and administrative
   
Summary Of Stock Based Compensation Expense Related To Restricted Stock and Option Awards [Line Items]    
Stock-based compensation expense $ 1,511,017 $ 152,400