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. 31, 2013	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 18,387	$ 19,025
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	8,876	9,898
Americas (excluding U.S.) [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	34	36
EMEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	1,072	1,173
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	7,173	6,763
APAC (excluding China) [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 1,232	$ 1,155