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Stock Option Plan and Stock Based Compensation - Additional Information (Detail) (USD $)
12 Months Ended
Feb. 28, 2014
Feb. 28, 2013
Feb. 29, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unissued common stock reserved 872,992    
Stock option award maximum term 10 years    
Share based compensation arrangements by share based payment award vesting period maximum 5 years    
Unrecognized compensation cost related to unvested stock options granted $ 144,000    
Fair value of shares underlying the options vested 1,500,000    
Remaining unrecognized compensation cost related to unvested restricted stock 1,200,000    
Weighted average remaining requisite service period of the unvested restricted stock awards 1 year 1 month 6 days    
Outstanding restricted stock underlying fair value at grant date 2,900,000    
Unvested Stock Options [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted average remaining requisite service period of the unvested stock options 1 year 2 months 12 days    
Selling, General and Administrative Expenses [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation expense related share based compensation before tax 1,500,000 1,500,000 1,000,000
Compensation expense related share based compensation net of tax $ 1,000,000 $ 900,000 $ 700,000