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Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Dec. 31, 2017
Gross Carrying Amount | $ 4,998 | $ 4,982
Accumulated Amortization | (3,517) | (3,433)
Finite-Lived Intangible Assets, Net | 1,481 | 1,549
Patent [Member] |  |
Gross Carrying Amount | 673 | 657
Accumulated Amortization | (314) | (306)
Finite-Lived Intangible Assets, Net | $ 359 | 351
Patent [Member] | Minimum [Member] |  |
Finite-Lived Intangible Asset, Useful Life | 1 year |
Patent [Member] | Maximum [Member] |  |
Finite-Lived Intangible Asset, Useful Life | 17 years |
Software [Member] |  |
Finite-Lived Intangible Asset, Useful Life | 3 years |
Gross Carrying Amount | $ 410 | 410
Accumulated Amortization | (400) | (398)
Finite-Lived Intangible Assets, Net | $ 10 | 12
Customer Relationships [Member] |  |
Finite-Lived Intangible Asset, Useful Life | 12 years |
Gross Carrying Amount | $ 3,370 | 3,370
Accumulated Amortization | (2,307) | (2,246)
Finite-Lived Intangible Assets, Net | $ 1,063 | 1,124
Permit [Member] |  |
Finite-Lived Intangible Asset, Useful Life | 10 years |
Gross Carrying Amount | $ 545 | 545
Accumulated Amortization | (496) | (483)
Finite-Lived Intangible Assets, Net | $ 49 | $ 62

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + 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)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + 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)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + 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)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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