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Goodwill and Intangible Assets (Tables) | 6 Months Ended
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Jun. 30, 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 |
Goodwill acquired |  | 1,300 |
Other |  | — |
Currency translation |  | (309 | )
Balance as of June 30, 2018 |  | $ | 13,348 |
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 |  | June 30, 2018
|  | Amortization Life in Years |  | Cost |  | Accumulated Amortization |  | Net
Patents |  | 10 |  | $ | 18,606 |  |  | $ | 11,537 |  |  | $ | 7,069 |
Customer contracts |  | 9 |  | 5,319 |  |  | 5,082 |  |  | 237 |
Non-contractual customer relationships |  | 9 |  | 55,979 |  |  | 9,929 |  |  | 46,050 |
Trademarks |  | 4 |  | 425 |  |  | 425 |  |  | — |
Trade name |  | 15 |  | 7,310 |  |  | 1,340 |  |  | 5,970 |
Developed technology |  | 11 |  | 81,963 |  |  | 11,379 |  |  | 70,584 |
Total amortized intangible assets |  |  |  | $ | 169,602 |  |  | $ | 39,692 |  |  | $ | 129,910 |
IPR&D |  |  |  | $ | 4,902 |  |  | — |  |  | $ | 4,902 |
Total intangible assets |  |  |  | $ | 174,504 |  |  | $ | 39,692 |  |  | $ | 134,812 |
|  | 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 June 30, 2018 estimated annual amortization for our intangible assets for each of the next five years is approximately (in thousands):
Remainder of 2018 |  | $ | 8,327 |
2019 |  | 15,964 |
2020 |  | 15,820 |
2021 |  | 15,517 |
2022 |  | 15,378 |
Thereafter |  | 58,904 |
Total |  | $ | 129,910 |

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