Income Taxes - Summary of Loss Before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Losses before income taxes:
U.S.	$ (37,055)	$ (23,408)
Non-U.S.	195	193
Loss before income tax benefit	$ (36,860)	$ (23,215)