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Segments and Geographic Areas (Details 2) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Unites States [Member]      
Revenue, Major Customer [Line Items]      
Net sales $ 144,000 $ 122,000 $ 119,000
United Kingdom [Member]      
Revenue, Major Customer [Line Items]      
Net sales 31,000 32,000 37,000
France [Member]      
Revenue, Major Customer [Line Items]      
Net sales $ 43,000 $ 34,000 $ 50,000