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Note 9 - Loss Per Share (Tables)
 6 Months Ended
Jun. 30, 2017
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended June 30,
    
Six Months Ended June 30,
  
   
2017
    
2016
    
2017
    
2016
  
                                 
Net loss
   $
(2,068
 )   $
(6,242
 )   $
(5,936
 )   $
(15,825
 )
                                 
Basic weighted-average common shares outstanding
    
9,610
      
9,580
      
9,607
      
9,576
  
Effect of potentially dilutive common shares
(1)
    
-
      
-
      
-
      
-
  
Diluted weighted-average common shares outstanding
    
9,610
      
9,580
      
9,607
      
9,576
  
                                 
Loss per basic and diluted common share
   $
(0.22
 )   $
(0.65
 )   $
(0.62
 )   $
(1.65
 )