Net Loss Per Share - Computation of basic and diluted loss per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Numerator:
Net loss	$ (44,566)	$ (11,325)
Net income attributable to the redeemable noncontrolling interest	164	60
Net income (loss) attributable to noncontrolling interests	164	(18)
Net loss attributable to holders of Class A common stock and Class B common stock	$ (44,894)	$ (11,367)
Denominator:
Weighted-average shares - basic	136,425	15,188
Weighted-average shares - diluted	136,425	15,188
Net loss per common share - basic	$ (0.33)	$ (0.75)
Net loss per common share - diluted	$ (0.33)	$ (0.75)