SHARE BASED COMPENSATION (Tables)

9 Months Ended

Sep. 30, 2016

Equity [Abstract]

Schedule of restricted stock activity

The following table summarizes the Company’s restricted stock activity during the nine months ended September 30, 2016:

	Number of Restricted Stock Units		Weighted Average Grant Date Fair Value
Outstanding December 31, 2015	429,666		$	20.38
Granted	245,000		17.52
Vested	(120,501	)	18.49
Forfeited/canceled	(54,835	)	15.39
Outstanding September 30, 2016	499,330		$	19.98

Schedule of stock option issuances and balances outstanding

The following table summarizes stock option activity during the nine months ended September 30, 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	1,685,250		16.72
Exercised	(220,109	)	10.11
Forfeited/canceled	(273,450	)	20.61
Outstanding at September 30, 2016	6,857,275		$	17.05	8.13	$	49,301

Schedule of Share based compensation expenses

The following table sets forth total non-cash stock-based compensation by operating statement classification for the three and nine months ended September 30, 2016 and 2015 (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2016		2015		2016		2015
Research and development	$	2,934	$	2,692	$	8,061	$	6,660
Selling, general & administrative	4,814		5,489		13,973		12,088
Total	$	7,748	$	8,181	$	22,034	$	18,748