Share-Based Payments (Tables)

9 Months Ended

Sep. 30, 2015

Share-Based Payments

Schedule of share-based compensation recognized related to the grant of employee and non-employee stock options, SARS, potential Employee Stock Purchase Plan (ESPP) 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 September 30,				Nine Months ended September 30,
	2015		2014		2015		2014
	(unaudited)				(unaudited)
Research and development	$	236	$	196	$	646	$	559
Selling, general and administrative	896		508		2,506		1,464
Total	$	1,132	$	704	$	3,152	$	2,023

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)	950,800		$	10.06
Exercised (unaudited)	(177,270	)	$	4.19
Forfeited or expired (unaudited)	(127,965	)	$	8.56
Outstanding, September 30, 2015 (unaudited)	2,726,314		$	8.89	8.14
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 September 30, 2015:
Vested and expected to vest (unaudited)	2,672,876		$	8.87	8.13
Exercisable (unaudited)	879,346		$	7.96	7.13