Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Sep. 29, 2018	Jun. 30, 2018	Oct. 01, 2016	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross				$ 136,398	$ 184,026
Impairment	$ (600)	$ (11,900)	$ (7,900)	(12,486)	(32,431)	$ (7,866)
Accumulated Amortization				(102,587)	(100,287)
Intangible assets, net				$ 21,325	$ 51,308
Developed technology
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)				5 years	4 years 8 months 12 days
Intangible assets, gross				$ 112,269	$ 158,700
Impairment				(12,486)	(32,431)
Accumulated Amortization				(83,185)	(81,847)
Intangible assets, net				$ 16,598	$ 44,422
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)				5 years 9 months 22 days	5 years 8 months 11 days
Intangible assets, gross				$ 22,934	$ 22,934
Impairment				0	0
Accumulated Amortization				(19,048)	(16,696)
Intangible assets, net				$ 3,886	$ 6,238
Licensed technology
Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)				5 years	3 years 6 months
Intangible assets, gross				$ 1,195	$ 2,392
Impairment				0	0
Accumulated Amortization				(354)	(1,744)
Intangible assets, net				$ 841	$ 648