Income Taxes (Details 4) - USD ($) $ in Thousands	Jul. 31, 2018	Jul. 31, 2017
Schedule Of Deferred Tax Assets (Liabilities) [Line Items]
Net deferred tax liabilities	$ 19,263	$ 1,997
UNITED STATES
Schedule Of Deferred Tax Assets (Liabilities) [Line Items]
U.S. current liabilities	0	(92)
Non-current liabilities	16,018	(1,054)
International [Member]
Schedule Of Deferred Tax Assets (Liabilities) [Line Items]
Non-current liabilities	$ (3,245)	$ (2,959)