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Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Dec. 31, 2018
Gross Carrying Amount | $ 5,062 | $ 5,053
Accumulated Amortization | (3,839) | (3,768)
Finite-Lived Intangible Assets, Net | 1,223 | 1,285
Patent [Member] |  |
Gross Carrying Amount | 735 | 728
Accumulated Amortization | (344) | (336)
Finite-Lived Intangible Assets, Net | $ 391 | 392
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 | $ 412 | 410
Accumulated Amortization | (404) | (403)
Finite-Lived Intangible Assets, Net | $ 8 | 7
Customer Relationships [Member] |  |
Finite-Lived Intangible Asset, Useful Life | 10 years |
Gross Carrying Amount | $ 3,370 | 3,370
Accumulated Amortization | (2,546) | (2,491)
Finite-Lived Intangible Assets, Net | $ 824 | 879
Permit [Member] |  |
Finite-Lived Intangible Asset, Useful Life | 10 years |
Gross Carrying Amount | $ 545 | 545
Accumulated Amortization | (545) | (538)
Finite-Lived Intangible Assets, Net |  | $ 7

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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/disclosureRef -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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 928 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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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