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Stock-Based Compensation (Details) (Textual) (USD $)
3 Months Ended 12 Months Ended
Oct. 31, 2012
Oct. 31, 2011
Jul. 31, 2011
Stock Based Compensation (Textual) [Abstract]      
Equity Incentive Plans 0    
Stock compensation   $ 1,000  
Number of equity incentive plans granted       
Stock Based Compensation (Additional Textual) [Abstract]      
Fair market value of the stock at the date of grant not less than 85% of the fair market value of the stock at the date of grant    
Compensation expense related to treasury stock issued to employees     0
Aggregate intrinsic value 0    
Stock Options [Member]
     
Stock Based Compensation (Textual) [Abstract]      
Unrecognized cost of nonvested option 0    
Equity Incentive Plan 1997 [Member]
     
Stock Based Compensation (Textual) [Abstract]      
Number of equity incentive plans granted 0 0  
Equity Incentive Plan 1999 [Member]
     
Stock Based Compensation (Textual) [Abstract]      
Number of equity incentive plans granted 0 0  
Equity Incentive Plan 2001 [Member]
     
Stock Based Compensation (Textual) [Abstract]      
Number of shares issued under 1999 equity incentive plan 0 0  
Employee Stock Purchase Plan [Member]
     
Stock Based Compensation (Textual) [Abstract]      
Stock compensation $ 0 $ 1,000  
Employee Stock Purchase Amended Plan [Member]
     
Stock Based Compensation (Textual) [Abstract]      
Equity Incentive Plans 200,000    
Minimum [Member]
     
Stock Based Compensation (Textual) [Abstract]      
Stock bonuses and restricted stock purchase agreements 85.00%    
Minimum [Member] | Stock Options [Member]
     
Stock Based Compensation (Textual) [Abstract]      
Options vest period 4 years    
Maximum [Member] | Stock Options [Member]
     
Stock Based Compensation (Textual) [Abstract]      
Options vest period 10 years