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Net Loss per Share of Common Stock (Net Loss Per Share Computation) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Earnings Per Share [Abstract]    
Net loss $ 340 $ (2,105)
Accretion of preferred stock to current redemption value (651) (750)
Net loss attributable to common shareholders $ (311) $ (2,855)
Basic and diluted weighted-average shares (in shares) 2,189,758 1,339,289
Basic and diluted loss per share (in dollars per share) $ (0.14) $ (2.13)