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Note 8 - Loss Per Common 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,
   
April 1,
 
   
2019
   
2018
 
   
(Unaudited)
 
Loss attributable to stockholders:
               
Net loss as reported
  $
(2,305
)   $
(1,795
)
Less distributed and undistributed earnings allocable to restricted awarded holders
   
0
     
0
 
Less dividends declared attributed to restricted awarded holders
   
0
     
0
 
Net loss allocable to common stockholders
  $
(2,305
)   $
(1,795
)
                 
Loss per common share attributable to stockholders:
               
Basic
  $
(0.11
)   $
(0.09
)
Diluted
  $
(0.11
)   $
(0.09
)
                 
Weighted average shares outstanding – basic
   
20,669
     
20,394
 
Weighted average additional shares assuming conversion of potential common shares
   
0
     
0
 
Weighted average shares outstanding – diluted
   
20,669
     
20,394