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INVENTORIES (Tables)
12 Months Ended
Dec. 31, 2015
INVENTORIES [Abstract]  
Schedule of Inventories

 

  December 31,  
    2014     2015  
Raw materials   $ 1,362,944     $ 2,343,104  
Work-in-process     5,411,360       5,626,531  
Finished goods     2,807,480       2,746,304  
Total   $ 9,581,784     $ 10,715,939