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Segment and Geographic Information (Revenue 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]      
Total Revenues $ 46,156 $ 55,750 $ 57,517
UNITED STATES      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Total Revenues 39,524 44,991 44,043
United Kingdom & Other [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Total Revenues $ 6,632 10,636 11,178
Asia [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Total Revenues   $ 123 $ 2,296