Summary of Significant Accounting Policies - Earning Per share Basic and Diluted (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share, Basic and Diluted [Abstract]
Net loss	$ (78,751)	$ (79,976)
Weighted-average common shares outstanding, basic and diluted	214,399,074	209,636,456
Net loss per share, basic and diluted	$ (0.37)	$ (0.38)