XML 54 R41.htm IDEA: XBRL DOCUMENT v3.2.0.727
Segment Reporting and Significant Customer Information - Revenue for Individual Countries that Exceed 10% of Total Revenue (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Revenue, Major Customer [Line Items]        
Total revenues $ 34,064 $ 36,883 $ 70,556 $ 77,078
United States        
Revenue, Major Customer [Line Items]        
Total revenues 22,496 23,690 45,927 48,430
United Kingdom        
Revenue, Major Customer [Line Items]        
Total revenues 6,856 7,528 14,727 16,740
Rest of the world        
Revenue, Major Customer [Line Items]        
Total revenues $ 4,712 $ 5,665 $ 9,902 $ 11,908