Changes in Deferred Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenue From Contract With Customer [Abstract]
Deferred revenue	$ 2,655	$ 2,433
Deferral of revenue billed in current period, net of recognition	504	381
Recognition of revenue deferred in prior periods	(714)	(1,030)
Deferred revenue	$ 2,445	$ 1,784