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Fair Value Measurements - Additional information (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 USD ($) Y | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Fair value measurements |  |  |
Measurement input | Y | 4 |  |
Gain on Fair Value Remeasurement of Contingent Consideration | $ 4,218 | $ 1,294 | $ 29,621
Discount rate | Weighted average |  |  |
Fair value measurements |  |  |
Measurement input | 8.1 |  |
Discount rate | Minimum |  |  |
Fair value measurements |  |  |
Measurement input | 8.0 |  |
Discount rate | Maximum |  |  |
Fair value measurements |  |  |
Measurement input | 9.0 |  |
Fair value |  |  |
Fair value measurements |  |  |
Asset transfer out of level 3 | $ 0 | 0 |
Asset transfer into level 3 | 0 | 0 |
Liabilities transfers out of level 3 | 0 | 0 |
Liabilities transfers into level 3 | 0 | 0 |
Assets level 1 to level 2 transfers | 0 | 0 |
Assets level 2 to level 1 transfers | 0 | 0 |
Liabilities level 1 to level 2 transfers | 0 | 0 |
Liabilities level 2 to level 1 transfers | $ 0 | $ 0 |

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- Definition Amount of increase (decrease) in the value of right to a contingent consideration asset. + 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 (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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