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Stock Based Compensation (Details Textual) (USD $)
 1 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 1 Months Ended 9 Months Ended
Apr. 30, 2003
Person
Oct. 31, 2012
Oct. 31, 2012
Stock Plan [Member]
Jun. 30, 2011
Stock Plan [Member]
Oct. 31, 2012
Option Plan [Member]
Oct. 31, 2011
Option Plan [Member]
Oct. 31, 2012
Option Plan [Member]
Oct. 31, 2011
Option Plan [Member]
Oct. 31, 2012
ISOs [Member]
Oct. 31, 2012
NSOs [Member]
Jun. 30, 2011
Restricted Stock [Member]
Oct. 31, 2012
Restricted Stock [Member]
Oct. 31, 2011
Restricted Stock [Member]
Stock-Based Compensation (Textual) [Abstract]                          
Number of shares of common stock authorized for grant during the period       500,000                  
Number of shares of common stock available for grant at October 31, 2012     201,500                    
Expiration date of Stock Plan     2021-07       2011-07            
Incentive stock option award expiration period                 10 years 10 years      
Period to become exercisable                 1 year 1 year      
Unrecognized compensation cost         $ 718,000   $ 718,000            
Compensation expense         338,000 126,000 906,000 475,000          
Intrinsic value of the stock options exercised             1,015,000            
Intrinsic value of outstanding stock options         3,533,000   3,533,000            
Restricted stock awarded to employee                     5,000    
Market value of the shares amortized                       19,000 9,000
Vesting period                       2 years  
Intrinsic value of exercisable stock options         $ 3,223,000   $ 3,223,000            
Expiration date of warrants   2012-12                      
Stock Based Compensation (Additional Textual) [Abstract]                          
Method used for fair value assumption   Black-Scholes option-pricing model                      
Expected period to recognize compensation expense   8 months                      
Warrants outstanding at October 31, 2012   4,000                      
Price for outstanding warrants exercisable   7.75                      
Number of individual to whom warrants issued 3                        
Shares exercised related to warrants   156,000