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Goodwill and Intangible Assets, Net - Components of Intangible Assets (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross | $ 61,648 | $ 61,766
Accumulated Amortization | (33,872) | (32,725)
Net | 27,776 | 29,041
Gross value of fully amortized intangible assets | 6,500 | 6,000
Distribution rights |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross | 353 | 344
Accumulated Amortization | (177) | (165)
Net | 176 | 179
Patents |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross | 13,258 | 13,250
Accumulated Amortization | (5,088) | (5,310)
Net | 8,170 | 7,940
Trademarks and trade names |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross | 2,776 | 2,786
Accumulated Amortization | (1,663) | (1,594)
Net | 1,113 | 1,192
Developed and core technology |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross | 12,544 | 12,560
Accumulated Amortization | (6,565) | (6,071)
Net | 5,979 | 6,489
Capitalized software development costs |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross | 142 | 142
Accumulated Amortization | (95) | (77)
Net | 47 | 65
Customer relationships |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross | 32,425 | 32,534
Accumulated Amortization | (20,134) | (19,395)
Net | 12,291 | 13,139
Order backlog |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Gross | 150 | 150
Accumulated Amortization | (150) | (113)
Net | $ 0 | $ 37

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