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Related Party Transactions (Details Textual) - USD ($) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2015 | Sep. 30, 2015 | Nov. 01, 2012 | Jul. 31, 2017 | Jul. 31, 2016 | Jul. 31, 2015
Related Party Transactions (Textual) |  |  |  |  |  |
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 |  |  |
Lease period |  |  | 1 year |  |  |
Lease renewal period |  |  | 1 year |  |  |
Outstanding net loan receivable from employees |  |  |  | $ 200,000 | $ 200,000 |
Sale of shares |  | $ 2,600,000 |  | 47,996,000 | 35,011,000 | 24,126,000
Gain on sale of shares | $ 500,000 |  |  | 300,000 | 500,000 |
Straight Path [Member] |  |  |  |  |  |
Related Party Transactions (Textual) |  |  |  |  |  |
Receivable from subsidiaries included in other current assets |  |  |  |  |  |
Cost and expenses related to services |  |  |  |  |  | 1,100,000
Jonas Media Group [Member] |  |  |  |  |  |
Related Party Transactions (Textual) |  |  |  |  |  |
Receivable from subsidiaries included in other current assets |  |  |  | 22,000 | 6,000 |
Rent received for office space, connectivity and other services |  |  |  | 22,000 | 22,000 | 21,000
Zedge [Member] |  |  |  |  |  |
Related Party Transactions (Textual) |  |  |  |  |  |
Receivable from subsidiaries included in other current assets |  |  |  | 100,000 | 300,000 |
Cost and expenses related to services |  |  |  | $ 1,000,000 | 600,000 |
Number of Straight Path Class B common stock received |  |  |  | 23,227 |  |
IGM Brokerage Corp. [Member] |  |  |  |  |  |
Related Party Transactions (Textual) |  |  |  |  |  |
Commissions and fees from payment by company |  |  |  | $ 24,000 | 22,000 | 20,000
Howard Jonas [Member] |  |  |  |  |  |
Related Party Transactions (Textual) |  |  |  |  |  |
Payable to officer |  |  |  |  | 92,400 |
Rafael Pharmaceuticals, Inc. [Member] |  |  |  |  |  |
Related Party Transactions (Textual) |  |  |  |  |  |
Receivable from subsidiaries included in other current assets |  |  |  | 600,000 |  |
Cost and expenses related to services |  |  |  | 600,000 |  |
Genie and Subsidiaries [Member] |  |  |  |  |  |
Related Party Transactions (Textual) |  |  |  |  |  |
Receivable from subsidiaries included in other current assets |  |  |  | 200,000 | 300,000 |
Cost and expenses related to services |  |  |  | 1,600,000 | 2,200,000 | 3,600,000
Mason and Company [Member] |  |  |  |  |  |
Related Party Transactions (Textual) |  |  |  |  |  |
Commissions and fees from payment by company |  |  |  | $ 22,000 | $ 24,000 | $ 18,000

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- Definition This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563 + Details
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