Share-Based Payments (Tables)

6 Months Ended

Jun. 30, 2015

Share-Based Payments

Schedule of share-based compensation recognized related to the grant of employee and non-employee stock options, SARS and non-vested stock

Share-based compensation recognized related to the grant of employee and non-employee stock options, SAR, potential Employee Stock Purchase Plan (ESPP) awards and non-vested stock was as follows, in thousands:

	Three Months ended June 30,				Six Months ended June 30,
	2015		2014		2015		2014
	(unaudited)				(unaudited)
Research and development	$	206	$	179	$	410	$	362
Selling, general and administrative	912		473		1,610		957
Total	$	1,118	$	652	$	2,020	$	1,319

Summary of stock option and SAR activity

	Number of Options		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)
Outstanding, December 31, 2014	2,080,749		$	7.93	8.04
Granted (unaudited)	892,500		$	9.33
Exercised (unaudited)	(165,733	)	$	4.13
Forfeited or expired (unaudited)	(121,603	)	$	8.56
Outstanding, June 30, 2015 (unaudited)	2,685,913		$	8.60	8.34
As of December 31, 2014:
Vested and expected to vest	2,041,026		$	7.91	8.03
Exercisable	626,548		$	6.40	6.91
As of June 30, 2015:
Vested and expected to vest (unaudited)	2,625,969		$	8.59	8.32
Exercisable (unaudited)	856,008		$	7.80	7.32