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Note 20 - Selected Quarterly Financial Information (Unaudited) (Tables)
12 Months Ended
Jan. 02, 2016
Notes Tables  
Schedule of Quarterly Financial Information [Table Text Block]
   
Sales
   
Gross
Profit
   
 
Operating
Income
   
 
Net
Income
   
Diluted
Income
Per Share
 
1st Quarter
  $ 47,966     $ 13,303     $ 2,355     $ 1,388     $ 0.11  
2nd Quarter
    45,286       12,090       1,210       689       0.05  
3rd Quarter
    45,077       12,802       1,906       962       0.07  
4th Quarter
    47,407       13,690       2,380       2,976       0.24  
                                         
Total
  $ 185,736     $ 51,885     $ 7,851     $ 6,015     $ 0.47  
   
Sales
   
Gross
Profit
   
 
Operating
Income
   
 
Net
Income
   
Diluted
Income
Per Share
 
1st Quarter
  $ 48,569     $ 12,257     $ 2,038     $ 1,203     $ 0.10  
2nd Quarter
    49,509       12,955       3,025       2,017       0.15  
3rd Quarter
    46,382       13,161       2,833       1,877       0.15  
4th Quarter
(1)
    49,310       13,320       2,622       1,717       0.14  
                                         
Total
  $ 193,770     $ 51,693     $ 10,518     $ 6,814     $ 0.54