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INVENTORIES (Details) - USD ($)
Apr. 01, 2017
Dec. 31, 2016
INVENTORIES    
Inventory reserves $ 1,200,000 $ 1,100,000
Raw materials 29,862,338 17,404,606
Work-in-progress 5,288,096 3,397,225
Finished goods 6,821,336 3,443,491
Total $ 41,971,770 $ 24,245,322