Goodwill and Intangible Assets - Summary Of Amortization Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Finite Lived Intangible Assets [Line Items]
Amortization expense, total	$ 0	$ 215	$ 144	$ 670
Cost of Revenues [Member]
Finite Lived Intangible Assets [Line Items]
Amortization expense, total	0	167	111	500
Operating Expense [Member]
Finite Lived Intangible Assets [Line Items]
Amortization expense, total	$ 0	$ 48	$ 33	$ 170