Segment Information, Operations By Geographic Area And Customer Concentration (Schedule Of Long-Lived Asset By Geographic Areas) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 28, 2014	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 27,629	$ 27,194
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	10,810	10,273
CANADA
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	4,456	2,132
Americas Excluding United States and Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	22	28
EMEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	783	914
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	9,964	11,905
APAC Excluding China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 1,594	$ 1,942