Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016
Net Revenue:
Total net revenue	$ 124,782	$ 89,053	$ 324,502	$ 251,309
Cost of Revenue:
Total cost of revenue	74,887	63,003	198,130	174,927
Gross Profit:
Total gross profit	49,895	26,050	126,372	76,382
Operating Expenses:
Research and development	28,532	18,229	76,650	56,700
Sales and marketing	16,216	12,844	44,938	39,089
General and administrative	13,039	9,078	33,894	27,333
Total operating expenses	57,787	40,151	155,482	123,122
Loss from Operations	(7,892)	(14,101)	(29,110)	(46,740)
Other Income (Expense), Net:
Interest expense	(815)	(32)	(1,286)	(163)
Change in fair value of preferred stock warrant liability	(37,682)	1,481	(40,333)	1,087
Other income (expense), net	212	(41)	423	(66)
Total other income (expense), net	(38,285)	1,408	(41,196)	858
Loss before income taxes	(46,177)	(12,693)	(70,306)	(45,882)
Income tax expense	58	50	144	103
Net loss attributable to common stockholders	$ (46,235)	$ (12,743)	$ (70,450)	$ (45,985)
Net loss per share attributable to common stockholders—basic and diluted	$ (8.79)	$ (2.66)	$ (14.09)	$ (9.73)
Weighted-average shares used in computing net loss per share attributable to common stockholders—basic and diluted	5,259,796	4,784,170	4,998,727	4,724,767
Player
Net Revenue:
Total net revenue, Goods	$ 67,254	$ 64,789	$ 184,583	$ 183,905
Cost of Revenue:
Total cost of revenue, Goods	61,925	56,156	165,047	155,531
Gross Profit:
Total gross profit	5,329	8,633	19,536	28,374
Platform
Net Revenue:
Total net revenue, Services	57,528	24,264	139,919	67,404
Cost of Revenue:
Total cost of revenue, Services	12,962	6,847	33,083	19,396
Gross Profit:
Total gross profit	$ 44,566	$ 17,417	$ 106,836	$ 48,008