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Goodwill and Intangible Assets, net - Narrative (Details) $ in Thousands, € in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Feb. 28, 2014 USD ($) | Sep. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Mar. 31, 2020 EUR (€) | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Mar. 31, 2020 EUR (€) | Jan. 17, 2020 USD ($) | Dec. 31, 2019 USD ($)
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |
Goodwill |  | $ 106,455 |  |  |  | $ 106,455 |  |  |  | $ 104,108
Amortization of intangibles |  |  |  |  |  | 8,929 | $ 8,400 |  |  |
DVS Sciences, Inc. |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |
Goodwill | $ 104,100 |  |  |  |  |  |  |  |  |
InstruNor AS |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |
Goodwill |  |  | $ 2,200 |  |  |  |  | € 2.0 | $ 2,220 |
Developed technology |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |
Amortization of intangibles |  | $ 3,200 |  |  | $ 3,000 | $ 9,600 | $ 9,200 |  |  |
Developed technology | DVS Sciences, Inc. |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |
Finite-lived intangible assets acquired | $ 112,000 |  |  |  |  |  |  |  |  |
Developed technology | InstruNor AS |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |
Finite-lived intangible assets acquired |  |  | $ 5,400 | € 4.9 |  |  |  |  |  |
Acquired finite-lived intangible assets, useful life |  |  | 8 years | 8 years |  |  |  |  |  |

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