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Goodwill and Intangible Assets (Tables) | 3 Months Ended
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Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill [Table Text Block] | The following table presents the changes in the carrying amount of our goodwill (in thousands):
|  | Total
Balance as of December 31, 2017 |  | $ | 12,357 |
Currency translation |  | (43 | )
Balance as of March 31, 2018 |  | $ | 12,314 |
Schedule of Intangible Assets and Goodwill [Table Text Block] | Intangible assets, carried at cost less accumulated amortization and amortized on a straight-lined basis, were as follows (in thousands):
|  | Weighted Average |  | March 31, 2018
|  | Amortization Life in Years |  | Cost |  | Accumulated Amortization |  | Net
Patents |  | 10 |  | $ | 17,664 |  |  | $ | 11,249 |  |  | $ | 6,415 |
Customer contracts |  | 9 |  | 5,319 |  |  | 4,987 |  |  | 332 |
Non-contractual customer relationships |  | 9 |  | 55,131 |  |  | 8,187 |  |  | 46,944 |
Trademarks |  | 4 |  | 425 |  |  | 425 |  |  | — |
Trade name |  | 15 |  | 7,310 |  |  | 1,218 |  |  | 6,092 |
Developed technology |  | 11 |  | 82,568 |  |  | 9,467 |  |  | 73,101 |
Total amortized intangible assets |  |  |  | $ | 168,417 |  |  | $ | 35,533 |  |  | $ | 132,884 |
IPR&D |  |  |  | $ | 3,761 |  |  | — |  |  | $ | 3,761 |
Total intangible assets |  |  |  | $ | 172,178 |  |  | $ | 35,533 |  |  | $ | 136,645 |
|  | Weighted Average |  | December 31, 2017
|  | Amortization Life in Years |  | Cost |  | Accumulated Amortization |  | Net
Patents |  | 10 |  | $ | 17,064 |  |  | $ | 10,970 |  |  | $ | 6,094 |
Customer contracts |  | 9 |  | 5,319 |  |  | 4,892 |  |  | 427 |
Non-contractual customer relationships |  | 9 |  | 55,080 |  |  | 6,562 |  |  | 48,518 |
Trademarks |  | 4 |  | 425 |  |  | 425 |  |  | — |
Trade name |  | 15 |  | 7,310 |  |  | 1,096 |  |  | 6,214 |
Developed technology |  | 11 |  | 81,846 |  |  | 7,571 |  |  | 74,275 |
Total amortized intangible assets |  |  |  | $ | 167,044 |  |  | $ | 31,516 |  |  | $ | 135,528 |
IPR&D |  |  |  | $ | 8,225 |  |  |  |  | $ | 8,225 |
Total intangible assets |  |  |  | $ | 175,269 |  |  | $ | 31,516 |  |  | $ | 143,753 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] | As of March 31, 2018 estimated annual amortization for our intangible assets for each of the next five years is approximately (in thousands):
Remainder of 2018 |  | $ | 12,255 |
2019 |  | 15,878 |
2020 |  | 15,739 |
2021 |  | 15,486 |
2022 |  | 15,311 |
Thereafter |  | 58,215 |
Total |  | $ | 132,884 |

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