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Note 12 - Net Income (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
 
                 
Net income (loss)
  $
2,165
    $
(1,951
)
                 
Basic weighted-average common shares outstanding
   
9,735
     
9,707
 
Effect of potentially dilutive common shares
(1)
   
-
     
-
 
Diluted weighted-average common shares outstanding
   
9,735
     
9,707
 
                 
Net income (loss) per common share:
               
Basic
  $
0.22
    $
(0.20
)
Diluted
  $
0.22
    $
(0.20
)