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Other (Expense) Income, Net (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jul. 31, 2018 | Jul. 31, 2017 | Jul. 31, 2016
Schedule of other (expense) income, net |  |  |
Foreign currency transaction (losses) gains | $ (2,107) | $ 287 | $ 980
(Loss) gain on marketable securities | (16) | 323 | 543
(Loss) gain on investments | (6) | 355 | (405)
Other | 781 | (148) | 931
TOTAL | $ (1,348) | $ 817 | $ 2,049

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