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7. Calculation of Basic and Diluted Earnings per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Numerator:    
Net (Loss) Income $ (1,136) $ 444
Denominator:    
Denominator for basic (loss) earnings per share- weighted-average shares 3,542,000 3,376,000
Dilutive potential common shares 0 78,000
Denominator for diluted (loss) earnings per share - weighted-average shares and assumed conversions 3,542,000 3,454,000
Basic and diluted (loss) earnings per common share $ (0.32) $ 0.13