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Goodwill and Intangible Assets (Notes) | 6 Months Ended
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Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Intangible Assets Disclosure [Text Block] | Goodwill and Intangible Assets, Net Goodwill The following table presents the changes in the carrying amount of our goodwill (in thousands):
|  | Total
Balance as of January 1, 2019 |  | $ | 11,195 |
Currency translation |  | (14 | )
Balance as of June 30, 2019 |  | $ | 11,181 |
Intangible Assets, Net Intangible assets, carried at cost less accumulated amortization and amortized on a straight-lined basis, were as follows (in thousands):
|  | Weighted Average |  | June 30, 2019
|  | Amortization Life in Years |  | Cost |  | Accumulated Amortization |  | Net
Patents |  | 10 |  | $ | 20,928 |  |  | $ | 12,812 |  |  | $ | 8,116 |
Customer contracts (1) |  | 12 |  | 10,002 |  |  | 5,319 |  |  | 4,683 |
Non-contractual customer relationships |  | 9 |  | 58,039 |  |  | 16,824 |  |  | 41,215 |
Trademarks |  | 4 |  | 425 |  |  | 425 |  |  | — |
Trade name |  | 15 |  | 7,456 |  |  | 1,876 |  |  | 5,580 |
Developed technology |  | 11 |  | 82,706 |  |  | 18,990 |  |  | 63,716 |
Total amortized intangible assets |  |  |  | $ | 179,556 |  |  | $ | 56,246 |  |  | $ | 123,310 |
IPR&D |  |  |  | $ | 10,744 |  |  |  |  | $ | 10,744 |
Total intangible assets |  |  |  | $ | 190,300 |  |  | $ | 56,246 |  |  | $ | 134,054 |
______________________________ (1) During the second quarter of 2019, we acquired certain assets from one of our distributors. We recorded $4.6 million in customer contracts related to that agreement.
|  | Weighted Average |  | December 31, 2018
|  | Amortization Life in Years |  | Cost |  | Accumulated Amortization |  | Net
Patents |  | 10 |  | $ | 19,399 |  |  | $ | 12,147 |  |  | $ | 7,252 |
Customer contracts |  | 9 |  | 5,319 |  |  | 5,272 |  |  | 47 |
Non-contractual customer relationships |  | 9 |  | 57,916 |  |  | 13,363 |  |  | 44,553 |
Trademarks |  | 4 |  | 425 |  |  | 425 |  |  | — |
Trade name |  | 15 |  | 7,456 |  |  | 1,618 |  |  | 5,838 |
Developed technology |  | 11 |  | 82,857 |  |  | 15,361 |  |  | 67,496 |
Total amortized intangible assets |  |  |  | $ | 173,372 |  |  | $ | 48,186 |  |  | $ | 125,186 |
IPR&D |  |  |  | $ | 8,235 |  |  |  |  | $ | 8,235 |
Total intangible assets |  |  |  | $ | 181,607 |  |  | $ | 48,186 |  |  | $ | 133,421 |
Intangible assets with definite lives are amortized on a straight-line basis over their estimated useful lives. During the three and six months ended June 30, 2019, intangible asset amortization expense was $4.0 million and $8.0 million, respectively, as compared to $4.0 million and $8.1 million for the three and six months ended June 30, 2018, respectively. As of June 30, 2019 estimated annual amortization for our intangible assets for each of the next five years is approximately (in thousands):
Remainder of 2019 |  | $ | 30,272 |
2020 |  | 16,589 |
2021 |  | 16,286 |
2022 |  | 16,142 |
2023 |  | 15,993 |
Thereafter |  | 28,028 |
Total |  | $ | 123,310 |

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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