Net Loss Per Common Share - Computation of Basic and Diluted Net Loss Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Numerator:
Net income (loss)	$ (29,966)	$ (28,118)	$ (88,397)	$ (45,313)
Denominator:
Weighted-average common shares outstanding, basic	86,597,405	77,775,497	86,441,212	76,837,503
Weighted-average common shares outstanding, diluted	86,597,405	77,775,497	86,441,212	76,837,503
Net loss per share, basic	$ (0.35)	$ (0.36)	$ (1.02)	$ (0.59)
Net loss per share, diluted	$ (0.35)	$ (0.36)	$ (1.02)	$ (0.59)