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Stock Option Plans (Details) - Schedule of Share-Based Compensation (USD $)
In Thousands, except Share data, unless otherwise specified
 6 Months Ended
Jul. 31, 2013
Jul. 31, 2012
Schedule of Share-Based Compensation [Abstract]    
Outstanding at January 31, 2013 168,755  
Outstanding at January 31, 2013 (in Dollars per share) $ 12.46  
Exercised (62,915)  
Exercised (in Dollars per share) $ 12.63 $ 32.53
Outstanding and exercisable at July 31, 2013 105,840  
Outstanding and exercisable at July 31, 2013 (in Dollars per share) $ 12.37  
Outstanding and exercisable at July 31, 2013 292 days  
Outstanding and exercisable at July 31, 2013 (in Dollars) $ 2,543