Summary of Gross Carrying Amount and Accumulated Amortization for Intangible Assets Resulting from Acquisitions (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Acquired Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 25,586	$ 25,635
Accumulated amortization	(17,448)	(15,531)
Intangible assets, net	$ 8,138	10,104
Trademarks
Acquired Finite Lived Intangible Assets [Line Items]
Amortization period (in years)	5 years
Gross carrying amount	$ 758	763
Accumulated amortization	(342)	(229)
Intangible assets, net	416	534
Developed Technology
Acquired Finite Lived Intangible Assets [Line Items]
Gross carrying amount	9,089	9,109
Accumulated amortization	(5,542)	(4,873)
Intangible assets, net	$ 3,547	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	$ 15,739	15,763
Accumulated amortization	(11,564)	(10,429)
Intangible assets, net	$ 4,175	$ 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