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Sale of Interest in Fabrix Systems Ltd. (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Oct. 08, 2014
Apr. 30, 2015
Oct. 31, 2014
Jul. 31, 2015
Jul. 31, 2014
Jul. 31, 2013
Sale of Interest in Fabrix Systems Ltd (Textual)            
Gain on sale of interest in Fabrix Systems Ltd.   $ 1,200 $ 75,100 $ 76,864  
Cash received from divestiture of interest in consolidated subsidiaries parent only portion       59,678
Fabrix Subsidiary [Member]            
Sale of Interest in Fabrix Systems Ltd (Textual)            
Common stock sold to Ericsson $ 95,000          
Sale of stock to Ericsson in percentage 100.00%          
Company owns in Fabrix in percentage 78.00%          
Escrow deposit $ 13,000          
Proceeds from divestiture of interest in consolidated subsidiaries $ 68,100          
Cash received from divestiture of interest in consolidated subsidiaries parent only portion       59,700    
Other receivables       $ 8,500