Net Loss Per Share - Computation of Basic and Diluted Net Loss Per Share Attributable to Common Stockholders (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Net loss	$ (7,536)	$ (12,931)
Convertible and redeemable series A-2 preferred stock dividend	(4,100)	(4,100)
Net loss attributable to common stockholders –basic and diluted	$ (11,636)	$ (17,031)
Weighted-average common shares outstanding – basic and diluted	29,662	25,117
Net loss per share attributable to common stockholders - basic and diluted	$ (0.39)	$ (0.68)