Future Minimum Lease Payments Under Non-cancelable Operating Leases (Detail) - USD ($) $ in Thousands		Dec. 31, 2023		Dec. 31, 2022
Leases [Abstract]
Operating leases, 2024	[1]	$ 2,729
Operating leases, 2025	[1]	2,794
Operating leases, 2026	[1]	2,650
Operating leases, 2027	[1]	1,591
Operating leases, 2028	[1]	1,611
Operating leases, thereafter	[1]	1,631
Total future minimum lease payments	[1]	13,006
Less: amount representing interest	[1]	273
Present value of minimum lease payments		12,733	[1]	$ 15,701
Expected sublease income, 2024		297
Expected sublease income, 2025		388
Expected sublease income, 2026		342
Expected sublease income, 2027		0
Expected sublease income, 2028		0
Expected sublease income, thereafter		0
Total future minimum lease payments		1,027
Less: amount representing interest		0
Present value of minimum lease payments		$ 1,027

[1] Includes future minimum lease payments of $3.2 million on leases that have been impaired because the property is no longer in use.