Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2014

A summary of the status of our stock options as of March 31, 2014, and changes during the period then ended, is presented below:



	Three Months Ended March 31,
	Number of Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life	Aggregate Intrinsic Value
Outstanding at beginning of period	4,866,602		$	2.38
Granted	1,468,230		1.77
Exercised	(265,000	)	0.47
Canceled and Forfeited	(4,250	)	3.02
Expired	(120,000	)	0.53
Outstanding at end of period	5,945,582		$	2.35	8.0 years	$	1,109,448

Exercisable at end of period	2,494,019		$	2.12	6.6 years	$	991,990

A summary of the status of our unvested restricted stock as of March 31, 2014, and changes during the period then ended, is presented below:



	Three Months Ended March 31,
	Number of Shares		Weighted Average Grant-Date Fair Value
Unvested at beginning of period	634,250		$	2.73
Granted	120,000		1.84
Vested	(149,000	)	3.16
Forfeited	—		—
Expired	—		—
Unvested at end of period	605,250		$	2.45