Other Expense, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	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)