CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Revenue:
Revenues	$ 102,715,000	$ 94,137,000	$ 201,338,000	$ 198,724,000
Costs and expenses:
Research and development	21,081,000	26,820,000	44,022,000	54,209,000
Selling, general, and administrative	21,068,000	21,938,000	48,111,000	45,843,000
Amortization of acquired intangible assets	4,523,000	8,737,000	10,159,000	17,251,000
Restructuring charges	4,376,000	1,576,000	5,405,000	1,642,000
Acquisition related charges	864,000	867,000	1,531,000	2,527,000
Impairment of acquired intangible assets	11,900,000	0	11,900,000	0
Total costs and expenses	116,279,000	102,866,000	215,697,000	208,155,000
Loss from operations	(13,564,000)	(8,729,000)	(14,359,000)	(9,431,000)
Interest expense	(4,968,000)	(4,656,000)	(10,082,000)	(10,224,000)
Other (expense) income, net	(348,000)	410,000	206,000	(77,000)
Loss before income taxes	(18,880,000)	(12,975,000)	(24,235,000)	(19,732,000)
Income tax expense	1,343,000	47,000	1,940,000	565,000
Net loss	$ (20,223,000)	$ (13,022,000)	$ (26,175,000)	$ (20,297,000)
Net loss per share, basic and diluted (in usd per share)	$ (0.16)	$ (0.11)	$ (0.21)	$ (0.17)
Shares used in per share calculations, basic and diluted (in shares)	124,843	122,390	124,460	122,095
Product
Revenue:
Revenues	$ 98,294,000	$ 83,168,000	$ 193,403,000	$ 175,837,000
Costs and expenses:
Cost of revenue	52,208,000	40,749,000	94,310,000	82,363,000
Licensing and services
Revenue:
Revenues	4,421,000	10,969,000	7,935,000	22,887,000
Costs and expenses:
Cost of revenue	$ 259,000	$ 2,179,000	$ 259,000	$ 4,320,000