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Business Segment, Geographic Area, Product Information and Significant Customer Information - Additional Information (Detail) - Segment	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Number of reportable segments	2
Applied Materials, Inc. [Member]
Percentage of total net revenues		12.00%	13.00%
Lam Research Corporation [Member]
Percentage of total net revenues		11.00%	12.00%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Percentage of total net revenues	10.00%

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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.

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+ References

No definition available.

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