Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 01, 2012	Jan. 02, 2011	Jan. 03, 2010
Net income (loss)	$ (7,594)	$ 123	$ (9,754)
Other comprehensive gain (loss), net of tax:
Change in unrealized gain (loss) on available-for-sale investments	(503)	(514)	1,130
Total comprehensive Income (loss)	$ (8,097)	$ (391)	$ (8,624)