Income Tax - Summary Of Unrecognized Gross Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Unrecognized tax benefits at beginning of year	$ 4,169	$ 2,692
Additions based on prior year tax provisions		118
Additions based on current year tax provisions	2,241	1,359
Unrecognized tax benefits at end of year	$ 6,410	$ 4,169