Significant Accounting Policies - Summary of Impact of Adopting Topic 606 Condensed Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	Feb. 02, 2019	Aug. 04, 2018	May 05, 2018	Feb. 03, 2018
Prepaid expense and other current assets	$ 104,719			$ 68,585
Deferred tax assets	30,033			23,311
Accounts payable and accrued expenses	320,441			318,765
Deferred revenue and customer deposits	152,595			149,404
Other current liabilities	101,347			51,166
Accumulated deficit	(376,810)	$ 223,459	$ 159,417	$ 152,394
Adjustments [Member] | Accounting Standards Update 2014-09 [Member]
Prepaid expense and other current assets	33,587
Deferred tax assets	(6,561)
Accounts payable and accrued expenses	(686)
Deferred revenue and customer deposits	9,304
Other current liabilities	(2,806)
Accumulated deficit	21,214
Balances without Adoption of Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Prepaid expense and other current assets	138,306
Deferred tax assets	23,472
Accounts payable and accrued expenses	319,755
Deferred revenue and customer deposits	161,899
Other current liabilities	98,541
Accumulated deficit	$ (355,596)