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STOCK-BASED COMPENSATION (Tables)
 9 Months Ended
Sep. 30, 2019
STOCK-BASED COMPENSATION [Abstract]  
Summary of Share Option Activities
The following table summarizes the Company’s employee share option activities during the nine months ended September 30, 2019:

  
Number of
Option Share
  
Weighted
Average Grant
Date Fair Value
  
Weighted
Average
Exercise
Price
 
Weighed Average
Remaining
Contractual Term
 
Outstanding at December 31, 2018
  
2,503,405
  
$
0.91
  
$
4.09
 
7.30 years
 
Granted
  
614,000
   
6.30
   
16.39
   
Exercised
  
(105,113
)
  
0.60
   
2.08
   
Expired
  
(628
)
  
0.55
   
3.00
   
Forfeited/cancelled
  
(41,203
)
  
1.35
   
3.82
   
Outstanding at September 30, 2019
  
2,970,461
  
$
2.55
  
$
6.71
 
7.28 years
 
Vested and exercisable at September 30, 2019
  
1,673,780
             

The following table summarizes the Company’s non-employee share option activities during the nine months ended September 30, 2019:

  
Number of
Option Shares
  
Weighted
Average Grant
Date Fair Value
  
Weighted
Average Exercise
Price
  
Weighted Average
Remaining
Contractual Term
 
Outstanding at December 31, 2018
  
1,212,374
  
$
0.78
  
$
2.57
  
6.66 years
 
Granted
  
-
   
-
   
-
   
-
 
Exercised
  
(88,529
)
  
0.45
   
1.06
   
-
 
Expired
  
-
   
-
   
-
   
-
 
Forfeited/cancelled
  
(22,232
)
  
0.55
   
3.00
   
-
 
Outstanding at September 30, 2019
  
1,101,613
  
$
0.82
  
$
2.69
  

6.10 years
 
Vested and exercisable at September 30, 2019
  
959,845