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8. Loss per Share (Tables)
9 Months Ended
Sep. 30, 2020
Earnings Per Share [Abstract]  
Computation of basic and diluted loss per share
    Three Months Ended     Nine months Ended  
    September 30, 2020     September 30, 2019     September 30, 2020     September 30, 2019  
Numerator:                        
Net income (loss) (for basic and diluted loss per share)   $ 678     $ 238     $ (817 )   $ (1,327 )
Denominator for basic loss per share weighted average shares     12,505,096       12,696,273       12,518,587       12,725,793  
Effect of dilutive securities:                                
Options and restricted stock units     12,397       12,784              
Denominator for diluted loss per share weighted average shares     12,517,493       12,709,057       12,518,587       12,725,793  
Basic loss per share   $ 0.05     $ 0.02     $ (0.07 )   $ (0.10 )
Diluted loss per share   $ 0.05     $ 0.02     $ (0.07 )   $ (0.10 )