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Note 9 - Loss Per Common Share (Tables)
 9 Months Ended
Sep. 29, 2019
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
    
Nine
Months Ended
  
   
September 29
,
    
September 30
,
    
September 29
,
    
September 30
,
  
   
201
9
    
201
8
    
2
019
    
201
8
  
   
(Unaudited)
    
(Unaudited)
  
Loss attributable to stockholders:
                                
Net loss as reported
   $
(1,557
)
   $
(2,336
)
   $
(3,090
)
   $
(3,317
)
Less distributed and undistributed earnings allocable to restricted award holders
    
0
      
0
      
0
      
0
  
Less dividends declared attributable to restricted award holders
    
0
      
0
      
0
      
0
  
Net loss allocable to common stockholders
   $
(1,557
)
   $
(2,336
)
   $
(3,090
)
   $
(3,317
)
                                 
Loss per common share attributable to stockholders:
                                
Basic
   $
(0.07
)
   $
(0.11
)
   $
(0.15
)
   $
(0.16
)
Diluted
   $
(0.07
)
   $
(0.11
)
   $
(0.15
)
   $
(0.16
)
                                 
Weighted average shares outstanding – basic
    
20,941
      
20,555
      
20,829
      
20,497
  
Weighted average additional shares assuming conversion of potential common shares
    
0
      
0
      
0
      
0
  
Weighted average shares outstanding – diluted
    
20,941
      
20,555
      
20,829
      
20,497