SHARE BASED COMPENSATION (Tables)

3 Months Ended

Mar. 31, 2016

Equity [Abstract]

Schedule of restricted stock activity

The following table summarizes the Company’s restricted stock activity during the three months ended March 31, 2016:

	Number of Restricted Stock Units		Weighted Average Grant Date Fair Value
Outstanding December 31, 2015	429,666		$	20.38
Granted	50,000		15.65
Vested	(40,832	)	14.38
Forfeited/canceled	(34,335	)	12.07
Outstanding March 31, 2016	404,499		$	21.10

Schedule of stock option issuances and balances outstanding

The following table summarizes stock option activity during the three months ended March 31, 2016:

	Shares Underlying Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (years)	Aggregate Intrinsic Value (in thousands)
Outstanding at December 31, 2015	5,665,584		$	17.05	8.75	$	31,542
Granted	55,000		15.16
Exercised	(85,750	)	9.11
Forfeited/canceled	(93,993	)	19.62
Outstanding at March 31, 2016	5,540,841		$	17.11	8.42	$	11,305

Schedule of Share based compensation expenses

The following table sets forth total non-cash stock-based compensation by operating statement classification for the three months ended March 31, 2016 and 2015 (in thousands):

	Three Months Ended March 31,
	2016		2015
Research and Development	$	2,486	$	2,220
Selling, General & Administrative	4,307		3,353
Total	$	6,793	$	5,573