Revenue Recognition - Summary of contract liabilities activity (Details) $ in Thousands	12 Months Ended
	Jul. 31, 2019 USD ($)
Contract Liabilities
Beginning Balance	$ 29,015
Revenue deferred in current year	61,996
Deferred revenue recognized	(61,913)
Foreign currency translation	(863)
Ending Balance	28,235
Contract liabilities included in Other long-term liabilities	(395)
Deferred revenue	$ 27,840