Acquisition-Related Amortization and Remeasurement - Components of Acquisition-Related Amortization and Remeasurement (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Acquisition Related Amortization And Remeasurement [Abstract]
Changes in fair value of contingent consideration	$ 1,500	$ (9,000)
Amortization of acquired intangibles	1,969	1,418
Acquired in-process research and development	1,000
Total	$ 4,469	$ (7,582)

Acquisition-related amortization and remeasurement.

No definition available.

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- Definition

Amortization expense related to intangible assets acquired through business combinations or asset acquisitions.

+ References

No definition available.

+ Details

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- Definition

Business combination acquired in process research and development.

+ References

No definition available.

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- Definition

Business combination acquisition-related amortization and remeasurement.

+ References

No definition available.

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- Definition

Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

+ 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=121586364&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=120321790&loc=d3e7008-128479

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