Changes in Deferred Revenue (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Deferred revenue	$ 2,655	$ 2,433
Deferral of revenue billed in current period, net of recognition	2,477	2,241
Recognition of revenue deferred in prior periods	(1,864)	(2,019)
Deferred revenue	$ 3,268	$ 2,655