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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract] |
Schedule of Acquired Intangible Assets by Major Asset Class | The following table sets forth our acquired intangible assets by major asset class as of December 31, 2017 and December 31, 2016 (in thousands except for useful life data):
|  |  |  | December 31, 2017 |  |  | December 31, 2016 |
|  | Useful life (years) |  | Gross |  |  | Accumulated amortization |  |  | Net book value before impairment |  |  | Impairment charge in 2016 |  |  | Net book value |  |  | Gross |  |  | Accumulated amortization |  |  | Net book value before impairment |  |  | Impairment charge |  |  | Net book value |
Purchased technology |  | 5-6 |  | $ | 265 |  |  | $ | (78 | ) |  | $ | 187 |  |  | $ | — |  |  | $ | 187 |  |  | $ | 265 |  |  | $ | (32 | ) |  | $ | 233 |  |  | $ | — |  |  | $ | 233 |
Customer relationships |  | 3-6 |  |  | 999 |  |  |  | (324 | ) |  |  | 675 |  |  |  | (411 | ) |  |  | 264 |  |  |  | 999 |  |  |  | (147 | ) |  |  | 852 |  |  |  | (411 | ) |  |  | 441 |
Trademarks/trade names |  | 2 |  |  | 38 |  |  |  | (28 | ) |  |  | 10 |  |  |  | — |  |  |  | 10 |  |  |  | 38 |  |  |  | (9 | ) |  |  | 29 |  |  |  | — |  |  |  | 29 |
Non-compete |  | 3 |  |  | 51 |  |  |  | (25 | ) |  |  | 26 |  |  |  | — |  |  |  | 26 |  |  |  | 51 |  |  |  | (9 | ) |  |  | 42 |  |  |  | — |  |  |  | 42 |
Total |  |  |  | $ | 1,353 |  |  | $ | (455 | ) |  | $ | 898 |  |  | $ | (411 | ) |  | $ | 487 |  |  | $ | 1,353 |  |  | $ | (197 | ) |  | $ | 1,156 |  |  | $ | (411 | ) |  | $ | 745 |
Future Amortization Expense Related to Intangible Assets | Future amortization expense related to intangible assets as of December 31, 2017 are as follows (in thousands):
Year Ending December 31, |  |  |  |
2018 |  |  | 249 |
2019 |  |  | 143 |
2020 |  |  | 46 |
2021 |  |  | 40 |
2022 |  |  | 9 |
Beyond |  |  | — |
Total |  | $ | 487 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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