SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2015

Accounting Policies [Abstract]

Schedule of potentially dilutive securities in our calculation of diluted net loss per share allocable to common stockholders

The table below presents the potentially dilutive securities that would have been included in our calculation of diluted net loss per share allocable to common stockholders if they were not antidilutive for the periods presented.

	As of December 31,
	2015		2014		2013
Stock options		20,725,325		16,792,443		15,632,742
Warrants		12,722,431		13,927,916		14,293,499
		33,447,756		30,720,359		29,926,241