Segment Information (Schedule Of Segment Information) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Oct. 01, 2011	Jul. 02, 2011	Apr. 02, 2011	Jan. 01, 2011	Oct. 02, 2010	Jul. 03, 2010	Apr. 03, 2010	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Segment Reporting Information [Line Items]
Revenues from external customers	$ 43,278	$ 43,809	$ 47,768	$ 39,782	$ 44,035	$ 38,156	$ 41,748	$ 34,373	$ 174,637	$ 158,312	$ 141,764
Depreciation and amortization									6,019	6,615	5,873
Operating (loss) income									12,046	9,070	845
Restructuring charges											1,860
Segment assets	155,415				146,720				155,415	146,720	141,279
Goodwill	15,279				15,279				15,279	15,279	15,279
Expenditures for long-lived assets									4,195	4,819	5,918
Cross Accessory Division [Member]
Segment Reporting Information [Line Items]
Revenues from external customers									102,131	97,776	90,892
Depreciation and amortization									4,564	4,780	4,374
Operating (loss) income									1,205	817	(5,211)
Restructuring charges											1,860
Segment assets	104,761				98,566				104,761	98,566	97,218
Expenditures for long-lived assets									2,510	3,734	4,181
Cross Optical Group [Member]
Segment Reporting Information [Line Items]
Revenues from external customers									72,506	60,536	50,872
Depreciation and amortization									1,455	1,835	1,499
Operating (loss) income									10,841	8,253	6,056
Segment assets	50,654				48,154				50,654	48,154	44,061
Goodwill	15,279				15,279				15,279	15,279	15,279
Expenditures for long-lived assets									$ 1,685	$ 1,085	$ 1,737