Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator:
Net loss available for common shareholders	$ (2,304)	$ (8,990)	$ (7,238)	$ (17,058)
Dilutive incremental share effect from:
Weighted-average common shares outstanding	140,107,000	106,872,000	133,661,000	104,435,000
Net loss per share - basic and diluted	$ (0.02)	$ (0.08)	$ (0.05)	$ (0.16)