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Goodwill and Intangible Assets, Net - Finite-Lived Intangibles (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Finite-Lived Intangible Assets, Net [Abstract]      
Gross [1] $ 54,417   $ 55,170
Accumulated Amortization [1] (27,082)   (26,621)
Net 27,335   28,549
Finite-lived intangible assets, fully amortized, gross 11,200   10,200
Amortization expense 1,600 $ 1,554  
Cost of sales      
Finite-Lived Intangible Assets, Net [Abstract]      
Amortization expense 19 21  
Selling, general and administrative expenses      
Finite-Lived Intangible Assets, Net [Abstract]      
Amortization expense 1,581 $ 1,533  
Distribution rights      
Finite-Lived Intangible Assets, Net [Abstract]      
Gross [1] 302   302
Accumulated Amortization [1] (119)   (119)
Net 183   183
Patents      
Finite-Lived Intangible Assets, Net [Abstract]      
Gross [1] 11,345   12,038
Accumulated Amortization [1] (3,988)   (4,775)
Net 7,357   7,263
Trademarks and trade names      
Finite-Lived Intangible Assets, Net [Abstract]      
Gross [1] 2,396   2,400
Accumulated Amortization [1] (1,371)   (1,310)
Net 1,025   1,090
Developed and core technology      
Finite-Lived Intangible Assets, Net [Abstract]      
Gross [1] 12,578   12,585
Accumulated Amortization [1] (4,569)   (4,068)
Net 8,009   8,517
Capitalized software development costs      
Finite-Lived Intangible Assets, Net [Abstract]      
Gross [1] 142   142
Accumulated Amortization [1] (24)   (5)
Net 118   137
Customer relationships      
Finite-Lived Intangible Assets, Net [Abstract]      
Gross [1] 27,654   27,703
Accumulated Amortization [1] (17,011)   (16,344)
Net $ 10,643   $ 11,359
[1] This table excludes the gross value of fully amortized intangible assets totaling $11.2 million and $10.2 million at March 31, 2017 and December 31, 2016, respectively.