Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended			6 Months Ended		12 Months Ended
	Aug. 03, 2019	May 04, 2019	Aug. 04, 2018	Aug. 03, 2019	Aug. 04, 2018	Feb. 02, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net income				$ 99,479	$ 88,367
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		$ 25,321	$ 21,354	52,510	41,939
Non-cash operating lease cost				33,227	34,118
Amortization of debt discount				22,962	17,645
Accretion of debt discount upon settlement of debt				(70,482)
Stock-based compensation expense	$ 5,300		6,100	10,993	14,092
Non-cash finance lease interest expense	5,672		3,319	11,186	6,411
Product recalls				(2,106)
Net non-cash charges resulting from inventory step-up					380
(Gain) loss on extinguishment of debt	(954)		917	(954)	917
Other non-cash interest expense				2,251	1,276
Change in assets and liabilities:
Accounts receivable				(504)	(9,050)
Merchandise inventories				51,189	(24,995)
Prepaid expense and other assets				(2,882)	(40,646)
Landlord assets under construction				(27,555)	(27,645)
Accounts payable and accrued expenses				(40,073)	(31,707)
Deferred revenue and customer deposits				12,987	20,800
Other current liabilities				3,179	8,179
Current and non-current operating lease liability				(44,513)	(43,025)
Other non-current obligations				(13,761)	(8,036)
Net cash provided by operating activities				97,133	49,020
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures				(25,283)	(42,916)
Net cash used in investing activities				(25,283)	(42,916)
CASH FLOWS FROM FINANCING ACTIVITIES
Borrowing under equipment security notes				69,000
Repayments under promissory and equipment security notes				(4,993)	(31,974)
Debt issuance costs				(4,636)
Principal payments under finance leases				(4,399)	(3,567)
Repurchases of common stock-including commissions				(250,032)
Proceeds from issuance of warrants					51,021
Purchase of convertible note hedges					(91,857)
Proceeds from exercise of stock options				7,223	29,209
Tax withholdings related to issuance of stock-based awards				(6,234)	(7,863)
Payments under promissory notes related to share repurchases				(892)
Net cash used in financing activities				(66,023)	(6,350)
Effects of foreign currency exchange rate translation				(75)	(124)
Net increase (decrease) in cash and cash equivalents and restricted cash equivalents				5,752	(370)
Cash and cash equivalents and restricted cash equivalents
Beginning of period-cash and cash equivalents		5,803		5,803	17,907	$ 17,907
Beginning of period-restricted cash equivalents (construction related deposits)					7,407	7,407
Beginning of period-cash and cash equivalents and restricted cash equivalents		$ 5,803		5,803	25,314	25,314
End of period-cash and cash equivalents	11,555		22,199	11,555	22,199	5,803
End of period-restricted cash equivalents (construction related deposits)			2,745		2,745
End of period-cash and cash equivalents and restricted cash equivalents	$ 11,555		$ 24,944	11,555	24,944	$ 5,803
Non-cash transactions:
Property and equipment additions in accounts payable and accrued expenses at period-end				10,875	7,713
Landlord asset additions in accounts payable and accrued expenses at period-end				21,055	17,183
Landlord asset additions from unpaid construction related deposits				195	517
Reclassification of assets from landlord assets under construction to finance lease right-of-use assets					31,131
Issuance of non-current notes payable related to share repurchases from former employees					243
Senior notes.
CASH FLOWS FROM FINANCING ACTIVITIES
Debt issuance costs					(6,349)
Repayments of convertible senior notes				(278,560)
Proceeds from issuance of convertible senior notes					335,000
Asset based credit facility
CASH FLOWS FROM FINANCING ACTIVITIES
Borrowing				302,000	510,000
Repayments				(214,500)	(709,970)
Term Loan
CASH FLOWS FROM FINANCING ACTIVITIES
Borrowing				$ 320,000
Repayments					$ (80,000)