Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 30, 2012	Jan. 01, 2012	Jan. 02, 2011
Net income (loss)	$ (12,314)	$ (7,594)	$ 123
Other comprehensive gain (loss), net of tax:
Change in unrealized gain (loss) on available-for-sale investments (See Note 4)	(124)	(503)	(514)
Total comprehensive Income (loss)	$ (12,438)	$ (8,097)	$ (391)