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Other Income (Expense), Net (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 31, 2019 | Jul. 31, 2019 | Jul. 31, 2018 | Jul. 31, 2017
Other Income and Expenses [Abstract] |  |  |  |
Foreign currency transaction (losses) gains |  | $ (696) | $ (2,107) | $ 287
(Loss) gain on marketable securities |  |  | (16) | 323
Gain (loss) on investments | $ 1,100 | 1,779 | (6) | 355
Other |  | (401) | 781 | (148)
TOTAL |  | $ 682 | $ (1,348) | $ 817

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