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Other Expense, Net (Details) - USD ($) $ in Thousands | 3 Months Ended
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Oct. 31, 2018 | Oct. 31, 2017
Schedule of other (expense) income, net |  |
Foreign currency transaction losses | $ (1,205) | $ (728)
Loss on investments | (46) | (119)
Gain on debt securities |  | 7
Other | (98) | 14
Total other expense, net | $ (1,349) | $ (826)

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