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Net Loss Per Share (Basic and Diluted Net Loss Per Share) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Numerator:    
Net loss $ (21,198) $ (18,887)
Dividend on convertible exchangeable preferred shares (201) (201)
Beneficial conversion feature of Series B preferred stock 0 0
Net loss attributable to common shareholders $ (21,399) $ (19,088)
Denominator:    
Weighted average common shares outstanding basic 11,255,677 8,926,173
Weighted average common shares outstanding diluted 11,255,677 8,926,173
Net loss per share - basic $ (1.90) $ (2.14)
Net loss per share - diluted $ (1.90) $ (2.14)