Summary of Gross Carrying Amount and Accumulated Amortization for Intangible Assets Resulting from Acquisitions (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Acquired Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 25,674	$ 25,659
Accumulated amortization	(18,375)	(18,096)
Intangible assets, net	$ 7,299	7,563
Trademarks
Acquired Finite Lived Intangible Assets [Line Items]
Amortization period (in years)	5 years
Gross carrying amount	$ 767	765
Accumulated amortization	(419)	(382)
Intangible assets, net	348	383
Developed Technology
Acquired Finite Lived Intangible Assets [Line Items]
Gross carrying amount	9,132	9,123
Accumulated amortization	(5,878)	(5,773)
Intangible assets, net	$ 3,254	3,350
Developed Technology | Minimum
Acquired Finite Lived Intangible Assets [Line Items]
Amortization period (in years)	10 years
Developed Technology | Maximum
Acquired Finite Lived Intangible Assets [Line Items]
Amortization period (in years)	12 years
Customer Relationships
Acquired Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 15,775	15,771
Accumulated amortization	(12,078)	(11,941)
Intangible assets, net	$ 3,697	$ 3,830
Customer Relationships | Minimum
Acquired Finite Lived Intangible Assets [Line Items]
Amortization period (in years)	4 years
Customer Relationships | Maximum
Acquired Finite Lived Intangible Assets [Line Items]
Amortization period (in years)	12 years