Fair Value Measurements - Additional Information (Detail) $ in Millions	12 Months Ended
Dec. 31, 2019 USD ($) Company	Sep. 30, 2020 USD ($)
Fair Value Disclosures [Abstract]
Fair value of future expected acquisition-related contingent consideration obligations	$ 0.8	$ 0.9
Number of companies acquired \| Company	3
Business acquisition, total consideration	$ 5.5
Business acquisition, consideration in cash	2.0
Business acquisition, deferred payments	1.5
Business acquisition, stock	1.2
Business acquisition, future earn outs	$ 1.0

Business combination consideration transferred deferred payments.

No definition available.

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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 8
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- Definition

Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

+ References

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- Definition

Amount of liability recognized arising from contingent consideration in a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
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- Definition

Fair value of contingent consideration in a business combination that is classified in shareholders' equity.

+ 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
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- References

No definition available.

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- Definition

The number of businesses acquired by the entity during the period.

+ References

No definition available.

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

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