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Other Operating Expense, Net (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Apr. 30, 2020 | Apr. 30, 2019 | Apr. 30, 2020 | Apr. 30, 2019
Other Operating Expense [Abstract] |  |  |  |
Corporate-Straight Path Communications Inc. class action legal fees net of insurance proceeds | $ 152 | $ (120) | $ (269) | $ (645)
net2phone-indemnification claim and other, net | (386) |  | (920) |
net2phone-other, net |  |  | (63) | 25
Telecom & Payment Services-accrual for non-income related taxes related to a foreign subsidiary |  | (2,300) | (2,150) | (5,400)
Telecom & Payment Services-gain on sale of calling card business in Asia |  |  |  | 215
Total other operating expense, net | $ (234) | $ (2,420) | $ (3,402) | $ (5,805)

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- Definition Amount of Telecom and Payment Services - gain on sale of calling card business in Asia. + References No definition available. + Details
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