Organization - Additional Information (Detail) $ in Millions	12 Months Ended
Dec. 31, 2020 USD ($) Country	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of countries operate globally \| Country	14
Secondary Offering [Member] \| Selling, General and Administrative Expense [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Offering costs \| $	$ 0.4	$ 2.9	$ 1.3

The cash outflow for cost incurred directly with the issuance of an equity security.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

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