CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2017	Jan. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 6,486	$ 3,979	$ 12,227	$ 8,570
Other comprehensive income
Foreign currency translation loss	(360)	(1,914)	(2,671)	(2,398)
Total comprehensive income	$ 6,126	$ 2,065	$ 9,556	$ 6,172