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Other (Expense) Income, Net (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Apr. 30, 2020 | Apr. 30, 2019 | Apr. 30, 2020 | Apr. 30, 2019
Other (Expense) Income, Net (Textual) |  |  |  |
Foreign currency transaction (losses) gains | $ (774) | $ (3) | $ 175 | $ (838)
(Loss) gain on investments | (1,226) | 623 | (817) | 704
Other | (144) | (260) | (718) | (360)
Total other (expense) income, net | $ (2,144) | $ 360 | $ (1,360) | $ (494)

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