Components of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Numerator:
Net loss available for common shareholders - basic and diluted	$ (14,962)	$ (2,304)	$ (21,193)	$ (7,238)
Weighted-average common shares outstanding - basic and diluted	158,818	140,107	157,136	133,661
Net loss per share - basic and diluted	$ (0.09)	$ (0.02)	$ (0.13)	$ (0.05)