Quarterly report pursuant to Section 13 or 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
9 Months Ended
Sep. 30, 2018
Accounting Policies [Abstract]  
Schedule of number of anti-dilutive shares excluded from the calculation of diluted net loss per share attributable to common stockholders
The following table presents the number of shares excluded from the calculation of diluted net loss per share attributable to common stockholders for the periods below:
 
 
Nine Months Ended September 30,
 
2017
 
2018
Common stock warrants
6,202,147

 
3,385,100

Common stock options
908,560

 
1,234,967

Non-vested restricted stock unit awards
1,401,693

 
2,071,299

Total shares excluded from net loss per share attributable to common stockholders
8,512,400

 
6,691,366