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8. Loss per Share (Tables)
6 Months Ended
Jun. 30, 2019
Earnings Per Share [Abstract]  
Computation of basic and diluted (loss) income per share
    Three Months Ended     Six Months Ended  
   

June 30,

2019

   

June 30,

2018

   

June 30,

2019

   

June 30,

2018

 
Numerator:                        
Net (loss) income (numerator for basic and diluted income per share)   $ (247 )   $ 947     $ (1,565 )   $ 503  
Denominator:                                
Denominator for basic (loss) income per share weighted average shares     12,720,112       13,532,958       12,740,798       13,567,778  
Effect of dilutive securities:                                
Options and restricted stock units           14,436             27,808  
Denominator:                                
Denominator for diluted (loss) income per share weighted average shares     12,720,112       13,547,394       12,740,798       13,595,586  
Basic (loss) income per share   $ (0.02 )   $ 0.07     $ (0.12 )   $ 0.04  
Diluted (loss) income per share   $ (0.02 )   $ 0.07     $ (0.12 )   $ 0.04