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Summary of Significant Accounting Policies - Impairment of Long-Lived and Intangible Assets (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2018 USD ($)
Impairment of Long-Lived and Intangible Assets |
Impairment charges | $ 0.5
Patents |
Impairment of Long-Lived and Intangible Assets |
Estimated useful lives of assets | 20 years
Minimum | Proprietary Technology |
Impairment of Long-Lived and Intangible Assets |
Estimated useful lives of assets | 3 years
Minimum | Customer relationships |
Impairment of Long-Lived and Intangible Assets |
Estimated useful lives of assets | 5 years
Maximum | Proprietary Technology |
Impairment of Long-Lived and Intangible Assets |
Estimated useful lives of assets | 7 years
Maximum | Customer relationships |
Impairment of Long-Lived and Intangible Assets |
Estimated useful lives of assets | 12 years

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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 The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 + Details
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