Income taxes - Schedule of Components of Loss Before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Domestic	$ (292,213)	$ (120,114)	$ (320,594)
Foreign	0	0	0
Loss before income taxes	$ (292,213)	$ (120,114)	$ (320,594)