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SEGMENT INFORMATION (Tables)
12 Months Ended
Dec. 31, 2018
Segment Reporting [Abstract]  
Schedule of Revenues of Major Customers
The following customers individually accounted for 10% or more of revenues:
 
 
 
Year ended December 31,
 
 
 
2016
 
 
2017
 
 
2018
 
Customer A
 
 
*
 
 
$
39,219,089
 
 
$
115,411,965
 
Customer B
 
$
47,696,332
 
 
$
43,258,204
 
 
$
57,858,670
 
Customer C
 
 
*
 
 
$
39,099,677
 
 
 
*
 
  
*
 
Represents less than 10%