Segment Information (Schedule Of Segment Information) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013 segment	Mar. 31, 2012	Dec. 29, 2012
Segment Reporting Information [Line Items]
Number of reportable business segments	2
Revenues from External Customers	$ 44,401	$ 41,946
Depreciation and Amortization	1,494	1,532
Operating Income (Loss)	2,618	2,387
Total Interest and Other Expense	(132)	(132)
Total Income Before Income Taxes	2,486	2,255
Expenditure for Long-Lived Assets	1,037	878
Segment Assets	152,285		161,339
Goodwill	15,279		15,279
Cross Accessory Division [Member]
Segment Reporting Information [Line Items]
Revenues from External Customers	20,565	21,929
Depreciation and Amortization	1,050	1,143
Operating Income (Loss)	(1,066)	(462)
Expenditure for Long-Lived Assets	620	522
Segment Assets	87,691		101,909
Cross Optical Group [Member]
Segment Reporting Information [Line Items]
Revenues from External Customers	23,836	20,017
Depreciation and Amortization	444	389
Operating Income (Loss)	3,684	2,849
Expenditure for Long-Lived Assets	417	356
Segment Assets	64,594		59,430
Goodwill	$ 15,279		$ 15,279