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Note 11 - Net Loss Per Share (Tables)
 3 Months Ended
Mar. 31, 2018
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended March 31,
  
   
2018
    
2017
  
                 
Loss from continuing operations
   $
(1,951
 )   $
(3,542
 )
Loss on discontinued operations
    
-
      
(326
 )
Net loss
   $
(1,951
 )   $
(3,868
 )
                 
Basic weighted-average common shares outstanding
    
9,707
      
9,604
  
Effect of potentially dilutive common shares
(1)
    
-
      
-
  
Diluted weighted-average common shares outstanding
    
9,707
      
9,604
  
                 
Basic and diluted loss per common share:
                
Continuing operations
   $
(0.20
 )   $
(0.37
 )
Discontinued operations
    
-
      
(0.03
 )
Net loss per share
   $
(0.20
 )   $
(0.40
 )