Property and Equipment, net (Details) - USD ($) $ in Thousands	Aug. 03, 2019	Jul. 28, 2018
Property, Plant and Equipment [Line Items]
Property and equipment	$ 85,978	$ 54,580
Less: accumulated depreciation and amortization	(31,090)	(20,411)
Property and equipment, net	54,888	34,169
Computer equipment
Property, Plant and Equipment [Line Items]
Property and equipment	3,647	2,920
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Property and equipment	18,010	9,829
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment	27,967	16,091
Capitalized software
Property, Plant and Equipment [Line Items]
Property and equipment	34,571	24,982
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment	1,381	356
Building and land
Property, Plant and Equipment [Line Items]
Property and equipment	$ 402	$ 402