Schedule II - VALUATION AND QUALIFYING ACCOUNTS (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	$ 117	$ 63	$ 241
Charged to costs and expenses	(3)	81	(131)
Deductions – write-offs of accounts	(32)	(27)	47
Balance at end of period	82	117	63
Valuation Allowance for Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	8,142	7,002	39,145
Charged to costs and expenses	2,087	1,140	(32,143)
Deductions – write-offs of accounts	0	0	0
Balance at end of period	$ 10,229	$ 8,142	$ 7,002