CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Revenue:
Product	$ 95,109	$ 92,669
Licensing and services	3,514	11,918
Total revenue	98,623	104,587
Costs and expenses:
Cost of product revenue	42,102	41,614
Cost of licensing and services revenue	0	2,141
Research and development	22,941	27,389
Selling, general, and administrative	27,043	23,905
Amortization of acquired intangible assets	5,636	8,514
Restructuring charges	1,029	66
Acquisition related charges	667	1,660
Total costs and expenses	99,418	105,289
Loss from operations	(795)	(702)
Interest expense	(5,114)	(5,568)
Other income (expense), net	554	(487)
Loss before income taxes	(5,355)	(6,757)
Income tax expense	597	518
Net loss	$ (5,952)	$ (7,275)
Net loss per share, basic and diluted (in usd per share)	$ (0.05)	$ (0.06)
Shares used in per share calculations, basic and diluted (in shares)	124,076	121,800