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Segment Reporting - Percentage of Revenue by Geographic Area (Detail) - Geographic Concentration Risk - Total Revenue	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Concentration Risk [Line Items]
Revenues, percentage by country	100.00%	100.00%	100.00%	100.00%
North America
Concentration Risk [Line Items]
Revenues, percentage by country	44.00%	50.00%	42.00%	48.00%
Europe
Concentration Risk [Line Items]
Revenues, percentage by country	42.00%	36.00%	40.00%	38.00%
APAC/Other
Concentration Risk [Line Items]
Revenues, percentage by country	14.00%	14.00%	18.00%	14.00%

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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.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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