Net Loss Per Share - Computation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Numerator:
Net loss attributable to common stockholders	$ (16,562)	$ (5,562)
Denominator:
Weighted average shares outstanding, basic	170,249,708	86,762,463
Weighted average shares outstanding, diluted	170,249,708	86,762,463
Net loss per share, basic (usd per share)	$ (0.10)	$ (0.06)
Net loss per share, diluted (usd per share)	$ (0.10)	$ (0.06)