Segment Information (Schedule Of Segment Information) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013 segment	Jun. 30, 2012	Dec. 29, 2012
Segment Reporting Information [Line Items]
Number of reportable business segments			2
Revenues from External Customers	$ 53,502	$ 48,807	$ 97,903	$ 90,753
Depreciation and Amortization	1,459	1,493	2,953	3,025
Operating Income (Loss)	4,798	5,577	7,416	7,964
Total Interest and Other Expense	(164)	(279)	(296)	(411)
Total Income Before Income Taxes	4,634	5,298	7,120	7,553
Expenditure for Long-Lived Assets	1,300	1,132	2,337	2,010
Segment Assets	160,164		160,164		161,339
Goodwill	15,279		15,279		15,279
Cross Accessory Division [Member]
Segment Reporting Information [Line Items]
Revenues from External Customers	21,084	21,321	41,649	43,250
Depreciation and Amortization	999	1,095	2,049	2,238
Operating Income (Loss)	(2,354)	(700)	(3,420)	(1,162)
Expenditure for Long-Lived Assets	968	845	1,588	1,367
Segment Assets	88,143		88,143		101,909
Cross Optical Group [Member]
Segment Reporting Information [Line Items]
Revenues from External Customers	32,418	27,486	56,254	47,503
Depreciation and Amortization	460	398	904	787
Operating Income (Loss)	7,152	6,277	10,836	9,126
Expenditure for Long-Lived Assets	332	287	749	643
Segment Assets	72,021		72,021		59,430
Goodwill	$ 15,279		$ 15,279		$ 15,279