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Related Party Transactions (Details Textual) - USD ($)
 1 Months Ended 6 Months Ended 12 Months Ended
Oct. 31, 2012
Oct. 31, 2012
Jul. 31, 2015
Jul. 31, 2014
Jul. 31, 2013
Related Party Transaction [Line Items]          
Amount billed for electricity supplied and natural gas       $ 16,000 $ 21,000
Number of Straight Path Class B common stock received     64,624    
Amount paid for Straight Path Class B common stock received     $ 2,100,000    
Annual rent payment $ 69,025 $ 34,512      
Lease period 1 year        
Lease renewal period 1 year        
Outstanding net loan receivable from employees     $ 300,000 200,000  
Straight Path [Member]          
Related Party Transaction [Line Items]          
Receivable from subsidiaries included in other current assets     29,000  
Amount billed for electricity supplied and natural gas     $ 1,100,000 800,000  
Jonas Media Group [Member]          
Related Party Transaction [Line Items]          
Receivable from subsidiaries included in other current assets     7,000 4,000  
Rent received for office space, connectivity and other services     21,000 18,000 27,000
IGM Brokerage Corp [Member]          
Related Party Transaction [Line Items]          
Commissions and fees from payment by company     $ 20,000 $ 20,000 $ 15,000
Insurance payment made by the company    
Genie And Subsidiaries [Member]          
Related Party Transaction [Line Items]          
Receivable from subsidiaries included in other current assets     $ 500,000 $ 500,000  
Amount billed for electricity supplied and natural gas     3,600,000 3,100,000 $ 3,800,000
Mason And Company [Member]          
Related Party Transaction [Line Items]          
Commissions and fees from payment by company     $ 18,000 $ 18,000 $ 24,000