SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

3 Months Ended

Mar. 31, 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:

	Three Months Ended March 31,
	2016	2017
Common stock warrants	792,242	4,491,568
Common stock options	777,800	904,798
Non-vested restricted stock unit awards	547,618	1,401,903
Total shares excluded from net loss per share attributable to common stockholders	2,117,660	6,798,269