Share-Based Payments (Tables)

3 Months Ended

Mar. 31, 2013

Share-Based Payments

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

Stock-based compensation recognized related to the grant of employee and non-employee stock options, and non-vested stock was as follows, in thousands:

	Three Months ended March 31,
	2013		2012
	(unaudited)
Research and development	$	114	$	15
Selling, general and administrative	223		37
Total	$	337	$	52

Summary of stock option and SAR activity

					Weighted-
			Weighted-		Average
	Number of		Average		Remaining
	Options		Exercise Price		Contractual Term
Outstanding, December 31, 2012	569,911		$	5.72	7.88
Granted (unaudited)	899,332		$	7.89
Exercised (unaudited)	(33,365	)	$	0.62
Forfeited or expired (unaudited)	(7,718	)	$	6.88
Outstanding, March 31, 2013	1,428,160		$	7.20	9.00
As of December 31, 2012
Vested and expected to vest	564,083		$	5.72	7.87
Exercisable	200,312		$	2.11	5.73
As of March 31, 2013
Vested and expected to vest	1,377,755		$	7.18	8.99
Exercisable	170,339		$	2.44	5.98