Changes in Deferred Revenue (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Revenue From Contract With Customer [Abstract]
Deferred revenue	$ 2,433	$ 2,366
Deferral of revenue billed in current period, net of recognition	2,241	1,905
Recognition of revenue deferred in prior periods	(2,019)	(1,838)
Deferred revenue	$ 2,655	$ 2,433