Revenues - Additional Information (Detail)	1 Months Ended	12 Months Ended
Dec. 31, 2020 USD ($)	Dec. 31, 2020 Customer	Dec. 31, 2019 Customer	Dec. 31, 2018 Customer
Decrease in net revenues \| $	$ 6,723,000
Number of customers \| Customer		1	1	1
Customer Concentration Risk [Member] \| Sales Revenue, Net [Member]
Percentage of total net revenues		18.50%	12.70%	13.40%
Customer Concentration Risk [Member] \| Sales Revenue, Net [Member] \| China [Member]
Percentage of total net revenues		31.40%	22.10%	37.40%

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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