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Segment Information - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2020 Customer Segment Country	Dec. 31, 2019 Customer Country	Dec. 31, 2018 Customer Country
Segment Reporting Information
Number of operating segments | Segment	1
Geographic Concentration Risk
Segment Reporting Information
Number Of Individual Country accounted for 10% or more of total revenues	0	0	0
Number Of Individual country accounted for 10% or more of total consolidated assets	0	0
Customer Concentration Risk | Sales Revenue, Goods, Net
Segment Reporting Information
Number Of Individual Customer accounted for 10% or more of total consolidated revenues | Customer	0	0	0

X

- Definition

Number of individual country contributing as consolidated assets.

+ References

No definition available.

+ Details

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- Definition

Number of individual country contributing as consolidated revenues.

+ References

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- Definition

Number of individual customers that accounted for 10% or more of total consolidated revenues from continuing operations.

+ References

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X

- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8672-108599

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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

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