Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Feb. 02, 2020	Jan. 31, 2019	Jan. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (200,987)	$ (178,362)	$ (159,878)	[1]
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	89,710	70,878	61,744
Amortization of debt discount and debt issuance costs	27,179	21,031	0
Stock-based compensation expense	226,705	210,645	150,673
Other	1,336	(5,039)	2,054
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable, net	(79,442)	(135,649)	(74,505)
Inventory	2,393	(12,289)	(12,595)
Deferred commissions	(24,231)	(27,660)	(27,978)
Prepaid expenses and other assets	(16,734)	(6,972)	(23,799)
Operating lease right-of-use assets	26,511
Accounts payable	(18,856)	14,293	29,278
Accrued compensation and other liabilities	20,296	51,810	26,622
Operating lease liabilities	(25,377)
Deferred revenue	161,071	161,737	101,140
Net cash provided by operating activities	189,574	164,423	72,756
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property and equipment	(87,847)	(100,246)	(65,060)
Acquisitions, net of cash acquired	(51,594)	(13,899)	0
Purchase of other investment	0	(5,000)	0
Purchase of intangible assets	(9,000)	0	0
Purchases of marketable securities	(795,580)	(665,357)	(202,656)
Sales of marketable securities	200,251	19,878	66,489
Maturities of marketable securities	419,059	253,280	144,068
Net cash used in investing activities	(324,711)	(511,344)	(57,159)
CASH FLOWS FROM FINANCING ACTIVITIES
Net proceeds from exercise of stock options	42,899	47,771	24,677
Proceeds from issuance of common stock under employee stock purchase plan	43,298	33,444	22,137
Proceeds from issuance of convertible senior notes, net of issuance costs	0	562,062	0
Payment for purchase of capped calls	0	(64,630)	0
Repayment of debt assumed from acquisition	(11,555)	(6,101)	0
Tax withholding on vesting of restricted stock	(10,379)	(632)	0
Repurchases of common stock	(15,017)	(20,000)	0
Net cash provided by financing activities	49,246	551,914	46,814
Net increase (decrease) in cash, cash equivalents and restricted cash	(85,891)	204,993	62,411
Cash, cash equivalents and restricted cash, beginning of year	463,813	258,820	196,409
Cash, cash equivalents and restricted cash, end of year	377,922	463,813	258,820
Cash and cash equivalents	447,990	244,057
Cash, cash equivalents and restricted cash, end of year	377,922	258,820	258,820
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid for interest	718	371	0
Cash paid for income taxes	4,824	4,696	3,090
SUPPLEMENTAL DISCLOSURES OF NON-CASH    INVESTING AND FINANCING INFORMATION
Property and equipment purchased but not yet paid	6,814	13,873	9,940
Acquisition consideration held back to satisfy potential indemnification claims	0	3,725	0
Vesting of early exercised stock options	$ 0	$ 320	$ 1,042

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