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Note 3 - Earnings (Loss) Per Share (Tables)
3 Months Ended
Mar. 31, 2019
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three months ended March 31,
 
   
2019
   
2018
 
Numerator:
               
Net loss
  $
(2,349
)
  $
(1,846
)
Denominator:
               
Basic weighted average shares outstanding
   
16,630,597
     
8,307,125
 
Dilutive common stock equivalents using treasury stock method
   
     
 
Diluted weighted average shares outstanding
   
16,630,597
     
8,307,125
 
                 
Basic loss per common share
  $
(0.14
)
  $
(0.22
)
Diluted loss per common share
  $
(0.14
)
  $
(0.22
)
                 
Weighted average options outstanding
   
587,184
     
748,078
 
Anti-dilutive options not included in the computations
   
587,184
     
748,078