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Description Of Business And Significant Accounting Policies (Reconciliations Of The Numerators And Denominators On Basic And Diluted Earnings Per Share) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Earnings Per Common Share [Abstract]                    
Net income (loss) from continuing operations $ (167) $ (182) $ 9 $ (96) $ (88) $ 298 $ 99 $ 133 $ (436) $ 442
Net income from discontinued operations                   $ 1,127
Weighted average shares - basic                 10,651,342 10,628,170
Dilution effect of share-based compensation, treasury method                
Weighted average shares - dilutive                 10,651,342 10,628,170
Continuing operations                 $ (0.04) $ 0.04
Discontinued operations                   $ 0.11