Net Loss Per Share - Computation of Basic and Diluted Net (Loss) Income Per Share Attributable to Common Stockholders (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Net loss	$ (25,325)	$ (57,949)	$ (23,557)
Accretion of redeemable series A-1 preferred stock		(17,601)	(19,616)
Redeemable series A-1 preferred stock deemed dividend		(24,341)
Convertible and redeemable series A-2 preferred stock dividend	(16,400)	(6,970)
Net loss attributable to common stockholders – basic and diluted	$ (41,725)	$ (106,861)	$ (43,173)
Weighted-average common shares outstanding – basic and diluted	26,724	16,479	8,789
Net loss per share attributable to common stockholders – basic and diluted	$ (1.56)	$ (6.48)	$ (4.91)