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FAIR VALUE MEASUREMENT (Tables)
 12 Months Ended
Dec. 31, 2017
2013 Notes and 2016 Notes [Member]  
Fair Value Measurements, Recurring and Nonrecurring
The following parameters were used:
 
 
 
2013 Notes
 
 
2016 Notes
 
Stock price (USD)
 
 
0.6612
 
 
 
0.6612
 
Expected term
 
 
0.71
 
 
 
3.88
 
Risk free rate
 
 
1.66
%
 
 
2.08
%
Volatility
 
 
79.57
%
 
 
68.89
%
Yield
 
 
11.86
%
 
 
11.89
%