Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Income Statement [Abstract]
Product	$ 369,200	$ 366,127	$ 332,525
Licensing and services	36,766	0	0
Total revenue	405,966	366,127	332,525
Costs and expenses:
Cost of product revenue	184,914	159,940	154,281
Cost of licensing and services revenue	1,143	0	0
Research and development	136,868	88,079	80,966
Selling, general, and administrative	97,349	73,527	67,144
Acquisition related charges	22,450	0	0
Restructuring charges	19,239	17	388
Amortization of acquired intangible assets	29,580	2,948	2,960
Impairment of goodwill and intangible assets	21,655	0	0
Costs and expenses	513,198	324,511	305,739
(Loss) income from operations	(107,232)	41,616	26,786
Interest expense	(18,389)	(172)	(152)
Other (expense) income, net	(832)	1,497	(148)
(Loss) income before income taxes and equity in net loss of an unconsolidated affiliate	(126,453)	42,941	26,486
Income tax expense (benefit)	32,540	(5,639)	4,165
Equity in net loss of an unconsolidated affiliate, net of tax	(492)	0	0
Net (loss) income	(159,485)	48,580	22,321
Net loss attributable to noncontrolling interest	252	0	0
Net (loss) income attributable to stockholders	$ (159,233)	$ 48,580	$ 22,321
Net (loss) income per share
Basic net (loss) income per share (in dollars per share)	$ (1.36)	$ 0.41	$ 0.19
Diluted net (loss) income per share (in dollars per share)	$ (1.36)	$ 0.40	$ 0.19
Shares used in per share calculations:
Basic (in shares)	117,387	117,708	115,701
Diluted (in shares)	117,387	120,245	117,081