Summary of Gross Carrying Amount and Accumulated Amortization for Intangible Assets Resulting from Acquisitions (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Acquired Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 25,659	$ 25,635
Accumulated amortization	(18,096)	(15,531)
Intangible assets, net	$ 7,563	10,104
Minimum
Acquired Finite Lived Intangible Assets [Line Items]
Amortization period (in years)	4 years
Maximum
Acquired Finite Lived Intangible Assets [Line Items]
Amortization period (in years)	12 years
Trademarks
Acquired Finite Lived Intangible Assets [Line Items]
Amortization period (in years)	5 years
Gross carrying amount	$ 765	763
Accumulated amortization	(382)	(229)
Intangible assets, net	383	534
Developed Technology
Acquired Finite Lived Intangible Assets [Line Items]
Gross carrying amount	9,123	9,109
Accumulated amortization	(5,773)	(4,873)
Intangible assets, net	$ 3,350	4,236
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	$ 15,771	15,763
Accumulated amortization	(11,941)	(10,429)
Intangible assets, net	$ 3,830	$ 5,334
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