Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jul. 04, 2020	Jun. 29, 2019
Cash Flows from Operating Activities
Net loss	$ (83,803)	$ (147,983)
Adjustments to reconcile net loss to net cash used in operating activities:
Provision for doubtful accounts	6,045	48
Provision for excess and obsolete inventory	13,260	4,122
Depreciation	21,042	30,106
Non-cash lease expense	8,477	11,615
Accelerated depreciation of property and equipment	626	170
Amortization of intangible assets	7,078	4,121
Stock-based compensation	39,497	41,091
Deferred income taxes	(21,819)	134
Other	324	162
Changes in operating assets and liabilities, net of acquisition:
Accounts receivable	213,830	155,561
Inventories	56,544	(41,183)
Prepaid expenses and other assets	(5,753)	14,416
Income taxes receivable	(26,180)	(409)
Accounts payable	(123,657)	(100,517)
Accrued liabilities and other liabilities	(141,269)	(97,964)
Lease liabilities	(10,900)	(13,577)
Deferred revenue	(3,627)	(3,475)
Income taxes payable	813	(514)
Net cash used in operating activities	(49,472)	(144,076)
Cash Flows from Investing Activities
Purchase of property and equipment	(8,550)	(10,827)
Purchases of marketable securities	(59,735)	(220,495)
Maturities of marketable securities	139,365	239,429
Net cash provided by investing activities	71,080	10,123
Cash Flows from Financing Activities
Payment of financing lease liability	(1,384)	(937)
Proceeds from issuance of common stock	1,002	6,812
Taxes paid related to net share settlement of restricted stock units	(12,229)	(10,649)
Net cash used in financing activities	(12,611)	(4,774)
Net increase (decrease) in cash and cash equivalents	8,997	(138,727)
Cash and cash equivalents at beginning of period	334,479	473,956
Cash and cash equivalents at end of period	343,476	335,229
Proceeds from Sale of Debt Securities, Available-for-sale	$ 0	$ 2,016