STOCKHOLDERS' EQUITY AND NET LOSS PER SHARE (Tables)

3 Months Ended

Mar. 31, 2015

Stockholders' Equity Note [Abstract]

Stock Option Activity Under Equity Incentive Plans

The following table summarizes the stock option activity under our equity incentive plans as of March 31, 2015, and changes during the three months then ended:

	Shares		Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding at January 1, 2015	1,735,962		$	9.63
Granted	346,250		4.32
Exercised	(91,642	)	3.14
Forfeited, cancelled or expired	(28,292	)	8.67
Outstanding at March 31, 2015	1,962,278		$	9.01	8.1	$	202
Options exercisable at March 31, 2015	1,532,339		$	10.22	7.6	$	191