Net (Loss) Income per Share Attributable to Common Stockholders - Schedule of EPS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Net (loss) income and comprehensive (loss) income	$ (11,308)	$ (2,437)	$ (26,457)	$ 5,107	$ 3,938	$ (3,026)	$ (40,202)	$ 6,019
Accretion of redeemable convertible preferred stock to redemption value	0			(17)			(14)	(52)
Less: undeclared 8% non-cumulative dividend on participating securities	0			(5,090)			0	(5,967)
Net loss attributable to Class A and Class B stockholders, basic	(11,308)			0			(40,216)	0
Net loss attributable to Class A and Class B stockholders, diluted	$ (11,308)			$ 0			$ (40,216)	$ 0
Temporary equity dividend rate				8.00%				8.00%
Weighted-average Class A and Class B common shares outstanding - basic (in shares)	148,452,987			20,856,530			113,451,378	19,401,927
Weighted-average Class A and Class B common shares outstanding - diluted (in shares)	148,452,987			20,856,530			113,451,378	19,401,927
Net loss per share attributable to Class A and Class B common stockholders - basic (in shares)	$ (0.08)			$ 0			$ (0.35)	$ 0
Net loss per share attributable to Class A and Class B common stockholders - diluted (in shares)	$ (0.08)			$ 0			$ (0.35)	$ 0