United States and Foreign Components of Consolidated Loss before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
U.S.	$ (54,757)	$ (61,246)	$ (71,946)
Foreign	700	1,673	965
Loss before income taxes	$ (54,057)	$ (59,573)	$ (70,981)