Goodwill and Intangible Assets - Summary of Amortization Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Finite Lived Intangible Assets [Line Items]
Amortization expense, total	$ 70	$ 0	$ 70	$ 144
Cost of Revenues [Member]
Finite Lived Intangible Assets [Line Items]
Amortization expense, total	15	0	15	111
Operating Expense [Member]
Finite Lived Intangible Assets [Line Items]
Amortization expense, total	$ 55	$ 0	$ 55	$ 33