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Other Operating Expense, Net (Details Textual) - USD ($) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 24, 2017 | Jul. 31, 2019 | Jul. 31, 2018 | Jul. 31, 2017
Related Party Transaction [Line Items] |  |  |  |
Sale of majority interests in New SPIP |  |  | $ 6,000,000 |
Payment for transfer of the IP Interest |  |  | (6,000,000) |
Recorded expense for rendemnification |  | 300,000 |  |
Accrual for non-income related taxes |  | 8,000,000 |  |
Straight Path [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Expense related to legal settlement and mutual release, including legal fees |  |  |  | 10,000,000
Legal fees related to the FCC investigation |  |  |  | 900,000
Proceeds related to FCC investigation |  | 2,300,000 |  | $ 500,000
Legal fees |  | $ 2,000,000 | $ 1,700,000 |
Aggregate cash paid | $ 16,000,000 |  |  |
Intellectual property net proceeds receive percentage | 22.00% |  |  |
Settlement agreement, description |  | The Settlement Agreement and Release allocates (i) $10 million of the payment and the retained interest right to the settlement of claims and the mutual release and (ii) $6 million to the transfer of the IP Interest. |  |
Payment for settlement of claims and mutual release | $ 10,000,000 |  |  |
Payment for transfer of the IP Interest | 6,000,000 |  |  |
Pr Sp Ip Holdings Llc [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Sale of majority interests in New SPIP | $ 6,000,000 |  |  |

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