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Intangible Assets - Summary of Acquired Intangible Assets (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 | Dec. 31, 2018
Acquired Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 6,030 | $ 6,030
Accumulated Amortization | 2,069 | 1,578
Intangibles, Net | $ 3,961 | $ 4,452
Customer relationships |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |
Weighted Average Amortization Period (years) | 10 years | 10 years
Gross Carrying Amount | $ 4,830 | $ 4,830
Accumulated Amortization | 1,599 | 1,237
Intangibles, Net | $ 3,231 | $ 3,593
Developed technologies |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |
Weighted Average Amortization Period (years) | 9 years | 9 years
Gross Carrying Amount | $ 1,080 | $ 1,080
Accumulated Amortization | 374 | 274
Intangibles, Net | $ 706 | $ 806
Tradename |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |
Weighted Average Amortization Period (years) | 3 years | 3 years
Gross Carrying Amount | $ 120 | $ 120
Accumulated Amortization | 96 | 67
Intangibles, Net | $ 24 | $ 53

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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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