Share-Based Payments (Tables)

3 Months Ended

Mar. 31, 2014

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, and non-vested stock was as follows, in thousands:

	Three Months ended March 31,
	2014		2013
	(unaudited)
Research and development	$	184	$	114
Selling, general and administrative	483		223
Total	$	667	$	337

Summary of stock option and SAR activity

					Weighted-
			Weighted-		Average
	Number of		Average		Remaining
	Options and SAR		Exercise Price		Contractual Term
Outstanding, December 31, 2013	1,463,043		$	7.27	8.51
Granted (unaudited)	618,285		$	9.33
Exercised (unaudited)	(2,386	)	$	2.48
Forfeited or expired (unaudited)	(15,034	)	$	8.02
Outstanding, March 31, 2014 (unaudited)	2,063,908		$	7.89	8.73
As of December 31, 2013
Vested and expected to vest	1,425,752		$	7.26	8.50
Exercisable	256,227		$	4.47	6.44
As of March 31, 2014
Vested and expected to vest (unaudited)	2,003,361		$	7.87	8.71
Exercisable (unaudited)	509,444		$	6.18	7.52