RELATED PARTY TRANSACTIONS (Details 1) (USD $)	12 Months Ended
	Dec. 31, 2013
Number of Underlying Shares, Outstanding as of January 1, 2013 (in shares)	1,052,137
Number of Underlying Shares, Granted (in shares)	1,507,584
Number of Underlying Shares, Expired (in shares)	(1,625)
Number of Underlying Shares, Forfeited (in shares)	(269,831)
Number of Underlying Shares, Exercised (in shares)	(5,546)
Number of Underlying Shares, Outstanding as of December 31, 2013 (in shares)	2,282,719
Number of Underlying Shares, Exercisable as of December 31, 2013 (in shares)	1,063,612
Number of Underlying Shares, Vested and expected to vest (in shares)	2,125,932	[1]
Weighted-Average Exercise Price Per Share, Outstanding as of January 1, 2013 (in dollars per share)	$ 3.79
Weighted-Average Exercise Price Per Share, Granted (in dollars per share)	$ 4.86
Weighted-Average Exercise Price Per Share, Expired (in dollars per share)	$ 6.00
Weighted-Average Exercise Price Per Share, Forfeited (in dollars per share)	$ 4.40
Weighted-Average Exercise Price Per Share, Exercised (in dollars per share)	$ 1.79
Weighted-Average Exercise Price Per Share, Outstanding as of December 31, 2013 (in dollars per share)	$ 4.43
Weighted-Average Exercise Price Per Share, Exercisable as of December 31, 2013 (in dollars per share)	$ 4.49
Weighted-Average Exercise Price Per Share, Vested and expected to vest (in dollars per share)	$ 4.43	[1]
Weighted-Average Contractual Life Remaining in Years, Outstanding as of December 31, 2013	7 years 10 months 20 days
Weighted-Average Contractual Life Remaining in Years, Exercisable as of as of December 31, 2013	6 years 4 months 2 days
Weighted-Average Contractual Life Remaining in Years, Vested and expected to vest	7 years 9 months 14 days	[1]

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