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SHARE BASED COMPENSATION (Summary of Stock Option Activity) (Details) - USD ($)
12 Months Ended
Sep. 09, 2015
Jan. 12, 2015
Dec. 31, 2019
Dec. 31, 2015
Number of Options        
Options outstanding     9,240,067  
Granted 12,569,166 6,274,166 0 8,134,375
Exercised     (2,474,950)  
Options outstanding     6,765,117  
Options vested or expected to vest     20,207,103  
Options exercisable     6,764,509  
Weighted Average Exercise Price        
Options outstanding     $ 0.49  
Granted     0  
Exercised $ 0.59 $ 0.87 0.32  
Options outstanding     0.56  
Options vested or expected to vest     0.47  
Options exercisable     $ 0.56  
Weighted Average Remaining Contract Life        
Options outstanding     4 years 5 months 1 day  
Options vested or expected to vest     3 years 1 month 28 days  
Options exercisable     4 years 5 months 1 day  
Aggregate Intrinsic Value        
Options outstanding     $ 10,079,601  
Options vested or expected to vest     31,941,622  
Options exercisable     $ 10,078,718