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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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