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Note 12 - Net Loss Per Share (Tables)
 6 Months Ended
Jun. 30, 2018
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended June 30,
    
Six Months Ended June 30,
  
   
2018
    
2017
    
2018
    
2017
  
                                 
Loss from continuing operations
   $
(5,686
 )   $
(1,421
 )   $
(7,637
 )   $
(4,963
 )
Loss on discontinued operations
    
-
      
(647
 )    
-
      
(973
 )
Net loss
   $
(5,686
 )   $
(2,068
 )   $
(7,637
 )   $
(5,936
 )
                                 
Basic weighted-average common shares outstanding
    
9,727
      
9,610
      
9,717
      
9,607
  
Effect of potentially dilutive common shares
(1)
    
-
      
-
      
-
      
-
  
Diluted weighted-average common shares outstanding
    
9,727
      
9,610
      
9,717
      
9,607
  
                                 
Basic and diluted loss per common share:
                                
Continuing operations
   $
(0.59
 )   $
(0.15
 )   $
(0.79
 )   $
(0.52
 )
Discontinued operations
    
-
      
(0.07
 )    
-
      
(0.10
 )
Net loss per share
   $
(0.59
 )   $
(0.22
 )   $
(0.79
 )   $
(0.62
 )