CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Net sales	$ 221,162	$ 308,968	$ 322,667
Cost and expenses:
Cost of sales	153,184	208,839	212,672
Research and development	36,171	36,230	36,201
Selling, general and administrative	45,891	46,563	44,117
Total cost and expenses	235,246	291,632	292,990
Income (loss) from operations	(14,084)	17,336	29,677
Interest and other income	967	442	561
Income (loss) before income taxes	(13,117)	17,778	30,238
Income tax provision (benefit)	(874)	2,059	5,594
Net income (loss)	$ (12,243)	$ 15,719	$ 24,644
Income (loss) per share:
Basic	$ (0.50)	$ 0.65	$ 1.04
Diluted	$ (0.50)	$ 0.64	$ 1.02
Weighted average shares used in computing income (loss) per share:
Basic	24,459	24,134	23,732
Diluted	24,459	24,501	24,097