Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Details) - Schedule of stock options outstanding

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Stockholders' Equity (Details) - Schedule of stock options outstanding - $ / shares
 12 Months Ended
Jul. 31, 2015
Jul. 31, 2014
Jul. 31, 2013
Jul. 31, 2012
Stockholders' Equity (Details) - Schedule of stock options outstanding [Line Items]        
Shares (in Shares) 1,358,104 1,155,910 726,645 736,490
Weighted-Average Exercise Price (in Dollars per share) $ 3.04 $ 5.03 $ 10.39 $ 14.50
Exercise Price Range 1 [Member]        
Stockholders' Equity (Details) - Schedule of stock options outstanding [Line Items]        
Range of Exercise prices 2.53      
Range of Exercise prices $ 3.00      
Shares (in Shares) 978,232      
Weighted-Average Remaining Contractual Life in years 2 years 7 days      
Weighted-Average Exercise Price (in Dollars per share) $ 2.84      
Exercise Price Range 2 [Member]        
Stockholders' Equity (Details) - Schedule of stock options outstanding [Line Items]        
Range of Exercise prices 3.40      
Range of Exercise prices $ 4.66      
Shares (in Shares) 379,872      
Weighted-Average Remaining Contractual Life in years 171 days      
Weighted-Average Exercise Price (in Dollars per share) $ 3.55