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Selected Quarterly Financial Data (Unaudited) (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Jul. 31, 2017 | Apr. 29, 2017 | Jan. 31, 2017 | Oct. 31, 2016 | Jul. 31, 2016 | Apr. 30, 2016 | Jan. 31, 2016 | Oct. 31, 2015 | Jul. 31, 2015 | Jul. 31, 2017 | Jul. 31, 2016 | Jul. 31, 2015
Selected Quarterly Financial Data (Unaudited) (Textual) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Severance expense |  |  |  |  |  |  |  | $ 6,300 |  |  |  |  |  | $ 200 |  | $ 6,510 | $ 8,363
Gain on sale of interest in Fabrix Systems, Ltd. |  |  |  |  |  |  |  |  |  | $ 1,100 |  |  |  |  |  | 1,086 | 76,864
Gain on sale of member interest in Visa Europe Ltd. |  |  |  |  |  |  |  | 7,500 |  |  |  |  |  |  | (63) | 7,476 |
Loss from operations expense | $ 3,737 | [1] | $ (6,502) | [2] | $ 3,128 | $ 5,186 | [3] | $ 6,225 | [4] | $ 5,676 | [5] | $ 6,377 | $ 7,925 |  | 5,549 | 26,203 | 93,050
Benefit from income taxes |  |  |  |  |  | $ 16,600 |  |  |  |  |  |  |  |  | (2,021) | 4,110 | 6,088
Corporate -loss related to legal settlement and mutual release |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (10,436) |  |
Income tax expense on deferred tax assets | $ 11,100 |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 16,017 | $ 3,049 | 3,418
Straight Path [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Selected Quarterly Financial Data (Unaudited) (Textual) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate -loss related to legal settlement and mutual release |  |  | $ 10,100 |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0
[1] | Included in net loss was income tax expense of $11.1 million from an increase in the valuation allowance on deferred tax assets.
[2] | Included in loss from operations was expense of $10.1 million related to a legal settlement and mutual release, including legal fees incurred in the quarter.
[3] | Included in net income was a benefit from income taxes of $16.6 million from the full recognition of certain deferred tax assets.
[4] | Included in income from operations was severance expense of $6.3 million and gain on sale of member interest in Visa Europe Ltd. of $7.5 million.
[5] | Included in income from operations was gain on sale of interest in Fabrix Systems Ltd. of $1.1 million.

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