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Segment Information (Schedule of Revenues by Geographic Area) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues $ 99,275 $ 88,313 $ 85,405
China and Hong Kong [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 30,158 28,526 25,889
Taiwan [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 24,854 17,495 14,543
Korea [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 13,208 8,889 15,691
United States [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 10,219 12,518 11,705
Asia Other [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 7,836 11,336 6,072
Japan [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 7,035 3,204 4,010
Western Europe [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 5,380 5,739 6,519
Rest of the world [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues $ 585 $ 606 $ 976