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Net Loss Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Numerator:    
Net loss available for common shareholders $ (6,231) $ (4,934)
Dilutive incremental share effect from:    
Weighted-average common shares outstanding 155,454,000 127,214,000
Net loss per share - basic and diluted $ (0.04) $ (0.04)