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INVENTORIES. (Details) (USD $)
Dec. 28, 2013
Dec. 29, 2012
INVENTORIES.    
Raw materials $ 20,877,513 $ 21,557,053
Work-in-progress 3,673,301 3,654,801
Finished goods 7,945,441 7,097,077
Total $ 32,496,255 $ 32,308,931