STOCK BASED COMPENSATION (Details 3)	9 Months Ended
	Sep. 30, 2015 USD ($) $ / shares shares
Share Based Compensation Stock Options Activity [Line Items]
Number of Underlying Shares, Outstanding as of January 1, 2015 (in shares)	3,675,634
Number of Underlying Shares, Granted (in shares)	1,640,822
Number of Underlying Shares, Forfeited/canceled (in shares)	(559,047)
Number of Underlying Shares, Expired (in shares)	(350,000)
Number of Underlying Shares, Exercised (in shares)	0
Number of Underlying Shares, Outstanding as of September 30, 2015 (in shares)	4,407,409
Number of Underlying Shares, Exercisable as of September 30, 2015 (in shares)	1,618,524
Number of Underlying Shares, Vested and expected to vest (in shares)	4,047,912	[1]
Weighted-Average Exercise Price Per Share, Outstanding as of January 1, 2015 (in dollars per share) | $ / shares	$ 2.86
Weighted-Average Exercise Price Per Share, Granted (in dollars per share) | $ / shares	1.53
Weighted-Average Exercise Price Per Share, Forfeited/canceled (in dollars per share) | $ / shares	2.01
Weighted-Average Exercise Price Per Share, Exercised (in dollars per share) | $ / shares	0
Weighted-Average Exercise Price Per Share, Outstanding as of September 30, 2015 (in dollars per share) | $ / shares	2.31
Weighted-Average Exercise Price Per Share, Exercisable as of September 30, 2015 (in dollars per share) | $ / shares	3.38
Weighted-Average Exercise Price Per Share, Vested and expected to vest (in dollars per share) | $ / shares	$ 2.37	[1]
Weighted-Average Contractual Life Remaining in Years, Outstanding as of September 30, 2015	8 years 7 months 6 days
Weighted-Average Contractual Life Remaining in Years, Exercisable as of September 30, 2015	7 years 10 months 24 days
Weighted-Average Contractual Life Remaining in Years, Vested and expected to vest	8 years 7 months 6 days	[1]
Aggregate Intrinsic Value, Outstanding as of January 1, 2015 | $	$ 344,000
Aggregate Intrinsic Value, Granted (in dollars) | $	0
Aggregate Intrinsic Value, Forfeited (in dollars) | $	63,223
Aggregate Intrinsic Value, Exercised (in dollars) | $	0
Aggregate Intrinsic Value, Outstanding as of September 30, 2015 | $	500
Aggregate Intrinsic Value, Exercisable as of September 30, 2015 | $	0
Aggregate Intrinsic Value, Vested and expected to vest | $	$ 406	[1]

[1] vested shares and unvested shares after a forfeiture rate is applied