SEGMENT INFORMATION - Additional Information (Detail) $ in Thousands	12 Months Ended
	Jul. 31, 2019 USD ($) segment	Jul. 31, 2018 USD ($)	Aug. 01, 2018 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | segment	2
Number of reportable segments | segment	2
Total assets	$ 731,563	$ 827,050	$ 829,858
Total net revenue	819,830	645,258
U.S
Segment Reporting Information [Line Items]
Total assets	86,300	101,800
Total net revenue	557,200	358,300
China
Segment Reporting Information [Line Items]
Total net revenue	142,400	112,300
Netherlands
Segment Reporting Information [Line Items]
Total net revenue	51,400	59,500
Czech Republic
Segment Reporting Information [Line Items]
Total net revenue	$ 4,700	$ 48,700