Net Loss per Share Attributable to Common Stockholder - Schedule of Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net loss attributable to common stockholders, basic	$ (19,503)	$ (43,568)	$ (40,390)
Net loss attributable to common stockholders, diluted	$ (19,503)	$ (43,568)	$ (40,390)
Denominator:
Weighted average shares used to compute net loss per share, basic (in shares)	93,224,000	41,658,000	38,004,000
Weighted average shares used to compute net loss per share, diluted (in shares)	93,224,000	41,658,000	38,004,000
Net loss per share attributable to common stockholders, basic (in dollars per share)	$ (0.21)	$ (1.05)	$ (1.06)
Net loss per share attributable to common stockholders, diluted (in dollars per share)	$ (0.21)	$ (1.05)	$ (1.06)