Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator:
Net loss available for common shareholders	$ (2,826)	$ (6,141)	$ (10,064)	$ (23,199)
Dilutive incremental share effect from:
Weighted-average common shares outstanding	143,685,000	114,874,000	137,027,000	107,953,000
Net loss per share - basic and diluted	$ (0.02)	$ (0.05)	$ (0.07)	$ (0.21)