Related Party Transactions - Additional Information (Detail) (USD $)	1 Months Ended		6 Months Ended	12 Months Ended
	Oct. 31, 2012	Aug. 31, 2009	Oct. 31, 2012	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Related Party Transaction [Line Items]
Amount billed for electricity supplied and natural gas				$ 16,000	$ 21,000	$ 500,000
Number of years office rented		2 years
Annual rent payment	69,025	100,000	34,512
Construction cost to build out space		100,000
Lease and build out cost payment		300,000
Lease expiration date		Apr. 30, 2012
Lease period	1 year
Lease renewal period	1 year
Outstanding net loan receivable from employees				200,000	200,000
Straight Path [Member]
Related Party Transaction [Line Items]
Reduction of selling, general and administrative expense				800,000
Receivable from subsidiaries included in other current assets				29,000
Jonas Media Group [Member]
Related Party Transaction [Line Items]
Receivable from subsidiaries included in other current assets				4,000	6,000
Rent received for office space, connectivity and other services				18,000	27,000	29,000
IGM Brokerage Corp [Member]
Related Party Transaction [Line Items]
Commissions and fees from payment by company				20,000	15,000	19,000
Insurance Payment made by the Company						200,000
Genie and Subsidiaries [Member]
Related Party Transaction [Line Items]
Reduction of selling, general and administrative expense				3,100,000	3,800,000	2,700,000
Receivable from subsidiaries included in other current assets				500,000	600,000
Mason and Company [Member]
Related Party Transaction [Line Items]
Commissions and fees from payment by company				$ 18,000	$ 24,000	$ 20,000