Loss from Continuing Operations Before Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
United States	$ (10,377)	$ (87,400)	$ (80,926)
Loss before income tax expense	$ (10,377)	$ (87,400)	$ (80,926)