Segment Information, Operations By Geographic Area And Customer Concentration (Schedule Of Long-Lived Asset By Geographic Areas) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2014	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 26,005	$ 27,194
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	9,802	10,273
Americas Excluding United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	1,976	2,160
EMEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	903	914
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	11,561	11,905
APAC Excluding China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 1,763	$ 1,942