Share-Based Payments (Tables)

3 Months Ended

Mar. 31, 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:

	March 31,
	2015		2014
	(unaudited)
Research and development	$	204	$	184
Selling, general and administrative	697		483
Total	$	901	$	667

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)	866,300		$	9.22
Exercised (unaudited)	(68,896	)	$	2.13
Forfeited or expired (unaudited)	(11,656	)	$	7.95
Outstanding, March 31, 2015 (unaudited)	2,866,497		$	8.46	8.51
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 March 31, 2015:
Vested and expected to vest (unaudited)	2,793,934		$	8.45	8.49
Exercisable (unaudited)	913,327		$	7.54	7.42