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Loss Per Share (Reconciliation Of Numerators And Denominators Of Basic And Diluted Loss Per Share) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Loss (Numerator)    
Net loss - basic $ (6,067) $ (9,268)
Dilutive effect of common stock shares issuable upon exercise of stock options
Net loss - diluted $ (6,067) $ (9,268)
Shares (Denominator)    
Net loss - basic 8,313,091 7,475,936
Dilutive effect of common stock shares issuable upon exercise of stock options
Net loss - diluted 8,313,091 7,475,936
Per Share Amount    
Net loss per share - basic $ (0.73) $ (1.24)
Net loss per share - diluted $ (0.73) $ (1.24)