Net Loss per Share - Basic and Diluted Net Loss Per Share Attributable to Common Stockholders (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Numerator:
Net loss attributable to common stockholders	$ (40,133)	$ (71,174)
Denominator:
Weighted-average shares outstanding - basic	146,101,581	125,862,975
Weighted-average shares outstanding - diluted	146,101,581	125,862,975
Net loss per share attributable to common stockholders - basic	$ (0.27)	$ (0.57)
Net loss per share attributable to common stockholders - diluted	$ (0.27)	$ (0.57)
Anti-dilutive potential common stock equivalents excluded from the calculation of net loss per share
Investment, Type [Extensible Enumeration]	Warrant [Member]
Employee Stock Option
Anti-dilutive potential common stock equivalents excluded from the calculation of net loss per share
Anti-dilutive potential common stock equivalents excluded from the calculation of net loss per share:	19,158,617	16,826,144
Unvested Restricted Stock Units [Member]
Anti-dilutive potential common stock equivalents excluded from the calculation of net loss per share
Anti-dilutive potential common stock equivalents excluded from the calculation of net loss per share:	4,152,725	4,215,834
Shares Issuable under employee stock purchase plan [Member]
Anti-dilutive potential common stock equivalents excluded from the calculation of net loss per share
Anti-dilutive potential common stock equivalents excluded from the calculation of net loss per share:	75,488	68,594
Common Stock [Member]
Anti-dilutive potential common stock equivalents excluded from the calculation of net loss per share
Anti-dilutive potential common stock equivalents excluded from the calculation of net loss per share:	1,177,433	0