SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

9 Months Ended

Sep. 30, 2017

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,
	2016	2017
Common stock warrants	3,017,159	6,202,147
Common stock options	753,114	908,560
Non-vested restricted stock unit awards	874,075	1,401,693
Total shares excluded from net loss per share attributable to common stockholders	4,644,348	8,512,400