Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Finite and Indefinite Lived Intangible Assets [Line Items]
Intangible assets, Trade name	$ 2,422		$ 2,355
Intangible assets, gross	12,804		12,507
Accumulated amortization	(5,789)		(4,882)
Intangible assets, net	7,015	$ 7,050	7,625	$ 7,709	$ 8,241	$ 9,225
Customer Relationships [Member]
Finite and Indefinite Lived Intangible Assets [Line Items]
Intangible assets, gross	6,129		5,995
Developed Technology [Member]
Finite and Indefinite Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 4,253		$ 4,157