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INVENTORIES (Tables)
12 Months Ended
Dec. 31, 2014
INVENTORIES [Abstract]  
Schedule of Inventories

Inventories consist of the following:

 

  December 31,  
    2013     2014  
Raw materials   $ 2,084,050     $ 1,362,944  
Work-in-process     4,666,821       5,411,360  
Finished goods     3,749,385       2,807,480  
                 
Total   $ 10,500,256     $ 9,581,784