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INVENTORIES
12 Months Ended
Dec. 31, 2015
INVENTORIES [Abstract]  
INVENTORIES

7. INVENTORIES

 

Inventories consist of the following:

 

  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  

 

Inventory write-down was $29,905,734, $175,568 and $62,422 for the years ended December 31, 2013, 2014 and 2015, respectively.