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Inventory (Tables)
 6 Months Ended
Jun. 15, 2013
INVENTORY [Abstract]  
Schedule of Inventory, Current [Table Text Block]

The carrying value of inventory consisted of the following (in thousands):
 
6/15/2013
 
12/29/2012
Oil
$
14,108

 
$
11,549

Solvents
9,413

 
10,076

Machines
2,607

 
2,470

Drums
1,955

 
1,859

Accessories
1,578

 
1,518

Total inventory
29,661

 
27,472

Less: Machine refurbishing reserve
(217
)
 
(241
)
Total inventory - net
$
29,444

 
$
27,231