Share-based Compensation (Tables)

3 Months Ended

Mar. 31, 2015

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Non-Cash, Share-Based Compensation Expense

For the three month periods ended March 31, 2015 and 2014, the Company recognized the following non-cash, share-based compensation expense in the consolidated statements of operations (in thousands):

	Three Months Ended March 31,
	2015		2014
Research and development	$	42	$	40
General and administrative		88		118
Total	$	130	$	158

Summary of Stock Option and Stock Award Activities

Stock option transactions for the three month period ended March 31, 2015 under the Company’s stock incentive plans were as follows:

	Number of Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)
Options outstanding at December 31, 2014		1,068,515		$	2.89		8.25
Granted		121,780			0.67
Exercised	—			—
Forfeited and cancelled		(183	)		0.36
Options outstanding at March 31, 2015		1,190,112		$	2.66		8.20
Options exercisable at March 31, 2015		576,567		$	3.95		7.52
Options vested and expected to vest		1,188,716		$	2.66		8.19

Summary of RSU activity

Stock award transactions for the three month period ended March 31, 2015 under the Company’s stock incentive plans were as follows:

	Number of Shares			Weighted Average Grant Date Fair Value
Restricted stock units outstanding at December 31, 2014		471,029		$	1.62
Granted		203,920			0.67
Vested and released		(47,925	)		1.95
Forfeited and cancelled	—			—
Restricted stock units outstanding at March 31, 2015		627,024		$	1.29