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Consolidated Statements of Comprehensive Income Statement - USD ($)
$ in Thousands
12 Months Ended
Jul. 31, 2017
Jul. 31, 2016
Jul. 31, 2015
Statement of Comprehensive Income [Abstract]      
Net income $ 21,224 $ 14,976 $ 9,885
Other comprehensive income (loss):      
Foreign currency translation adjustments 1,179 (562) (4,937)
Unrealized (loss) gain on available-for-sale securities, net of tax benefit (expense) of $234, $(187), and $38 (231) 288 (83)
Reclassification adjustment for realized (gain) loss included in net income (151) 24 44
Other comprehensive income (loss) 797 (250) (4,976)
Comprehensive income $ 22,021 $ 14,726 $ 4,909