Net Loss Per Share - Summary of Basic and Diluted Net Loss Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Numerator:
Net loss	$ (126,260)	$ (122,055)	$ (107,245)	$ (95,764)	$ (248,315)	$ (203,009)
Denominator:
Weighted average number of common shares outstanding— basic	59,266,322		58,582,569		59,148,246	58,478,970
Dilutive effect of shares of common stock equivalents resulting from common stock options and restricted stock units	0		0		0	0
Weighted average common stock outstanding —diluted	59,266,322		58,582,569		59,148,246	58,478,970
Net loss per share—basic	$ (2.13)		$ (1.83)		$ (4.20)	$ (3.47)
Net loss per share—diluted	$ (2.13)		$ (1.83)		$ (4.20)	$ (3.47)