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Stock Based Compensation - Additional Information (Detail) (USD $)
9 Months Ended
Apr. 30, 2014
Apr. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock issued during period, shares, employee stock purchase plans 13,939  
Number of equity incentive plans granted 0  
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  
Aggregate intrinsic value $ 0  
Share based compensation shares authorized under stock purchase plans exercise price $ 0.80  
Employee Stock Option [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unrecognized cost of nonvested option 0  
Equity Incentive Plan 1997 [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of equity incentive plans granted 0  
Equity Incentive Plan 1999 [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of equity incentive plans granted 0  
Equity Incentive Plan 2001 [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of shares issued under 1999 equity incentive plan 0  
Employee Stock Purchase Plan [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Equity Incentive Plans 200,000  
Stock compensation $ 341 $ 0
Minimum [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock bonuses and restricted stock purchase agreements 85.00%  
Minimum [Member] | Employee Stock Option [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Options vest period 4 years  
Maximum [Member] | Employee Stock Option [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Options vest period 10 years