Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jul. 01, 2018
Cash flows from operating activities:
Net loss	$ (74,976)	$ (23,185)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	7,087	1,956
Premium amortization / discount accretion on investments, net	(274)	0
Stock-based compensation expense	10,042	1,899
Deferred income taxes	74	0
Changes in assets and liabilities:
Accounts receivable, net	86,338	47,395
Inventories	27,569	(40,620)
Prepaid expenses and other assets	1,784	(4,558)
Accounts payable	(59,865)	4,385
Deferred revenue	(2,527)	4,553
Accrued and other liabilities	(49,913)	5,437
Net cash used in operating activities	(54,661)	(2,738)
Cash flows from investing activities:
Purchases of property and equipment	(7,116)	(7,534)
Purchases of short-term investments	(24,793)	0
Proceeds from maturities of short-term investments	30,000	0
Net cash used in investing activities	(1,909)	(7,534)
Cash flows from financing activities:
Proceeds related to employee benefit plans	12	0
Restricted stock unit withholdings	(1,682)	0
Net investment from parent	0	10,297
Net cash provided by (used in) financing activities	(1,670)	10,297
Net increase (decrease) in cash and cash equivalents and restricted cash	(58,240)	25
Cash and cash equivalents and restricted cash, at beginning of period	155,424	108
Cash and cash equivalents and restricted cash, at end of period	97,184	133
Non-cash investing and financing activities:
Purchases of property and equipment included in accounts payable and accrued liabilities	(2,753)	2,166
De-recognition of build-to-suit assets and liabilities	$ (21,610)	$ 0