CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 29, 2013	Mar. 30, 2012
Income Statement [Abstract]
Product revenue	$ 82,475	$ 99,498
Service revenue	19,197	16,941
Net revenue	101,672	116,439
Product cost of revenue	45,237	59,176
Service cost of revenue	10,270	6,801
Total cost of revenue	55,507	65,977
Gross profit	46,165	50,462
Operating expenses:
Research and development	25,251	26,763
Selling, general and administrative	33,269	31,403
Amortization of intangibles	2,088	2,179
Restructuring and related charges	424
Total operating expenses	61,032	60,345
Loss from operations	(14,867)	(9,883)
Interest income, net	64	119
Other income (expense), net	(167)	403
Loss from continuing operations before income taxes	(14,970)	(9,361)
Benefit from income taxes	(5,467)	(626)
Loss from continuing operations	(9,503)	(8,735)
Income from discontinued operations, net of tax (including gain on disposal of $14,956, net of tax, for the three months ended March 29, 2013)	15,924	1,207
Net Income (loss)	$ 6,421	$ (7,528)
Basic net income (loss) per share from:
Continuing operations	$ (0.08)	$ (0.07)
Discontinued operations	$ 0.14	$ 0.01
Net Income (loss)	$ 0.06	$ (0.06)
Diluted net income (loss) per share from:
Continuing operations	$ (0.08)	$ (0.07)
Discontinued operations	$ 0.14	$ 0.01
Net Income (loss)	$ 0.06	$ (0.06)
Shares used in per share calculation:
Basic	115,219	117,275
Diluted	115,219	117,275