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Intangible Assets, net | 6 Months Ended
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Jun. 30, 2019
Intangible Assets, Net (Excluding Goodwill) [Abstract] |
Intangible Assets, Net and Goodwill | Intangible Assets, net The following table summarizes the Company’s intangible assets as of June 30, 2019 and December 31, 2018:
|  | Estimated Useful Life (Years) |  | Gross Carrying Amount at December 31, 2018 |  | Accumulated Amortization |  | Net Book Value at June 30, 2019
Developed technology |  | 13 |  | $ | 18,800 |  |  | $ | 1,567 |  |  | $ | 17,233 |
Customer relationships |  | 1 |  | 270 |  |  | 270 |  |  | — |
|  |  |  | $ | 19,070 |  |  | $ | 1,837 |  |  | $ | 17,233 |
The Company uses the straight-line method to determine the amortization expense for its definite lived intangible assets. The weighted-average remaining useful life for the intangible assets is 11.9 years. Amortization expense related to the purchased intangible assets was $407 and $284 for the three months ended June 30, 2019 and 2018, respectively, and $837 and $284 for the six months ended June 30, 2019 and 2018, respectively. The table below reflects the future estimated amortization expense for amortizable intangible assets as of June 30, 2019.
Remainder of 2019 |  | $ | 723 |
2020 |  | 1,446 |
2021 |  | 1,446 |
2022 |  | 1,446 |
2023 |  | 1,446 |
Thereafter |  | 10,726 |
Total |  | $ | 17,233 |

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- Definition The entire disclosure for all or part of the information related to 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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- References No definition available. + Details
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