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Segment Information and Operations By Geographic Area (Schedule Of Long-Lived Asset By Geographic Areas) (Details) - USD ($)
$ in Thousands
Jun. 28, 2015
Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived assets $ 25,591 $ 29,694
United States [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived assets 10,730 12,453
CANADA    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived assets 4,258 4,375
EMEA [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived assets 559 657
China [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived assets 8,682 10,786
APAC Excluding China [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived assets $ 1,362 $ 1,423