Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2012

Stock-Based Compensation [Abstract]

Summary of Share Based Compensation of Fair Value Assumptions

	Six months ended June 30, 2012	Six months ended June 30, 2011
Expected volatility	85.41% -111.36%	76.91% -102.63%
Expected dividend yield	0.00%	0.00%
Risk-free interest rate	1.02% –1.98%	2.25% –3.25%
Expected life	5.5 – 10.0 years	5.5 –10.0 years
Forfeiture rate	0% - 2%	0% - 5%

Summary of Company's Stock Option activity

	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value
Outstanding at December 31, 2011		1,628,167		$	1.35		6.26
Granted		813,500		$	0.66		9.64
Exercised		—			—
Canceled or expired		(97,167	)	$	2.43
Outstanding at June 30, 2012		2,344,500		$	1.06		7.11	$	0
Exercisable at June 30, 2012		1,128,125		$	1.30		5.39	$	0
Vested and expected to vest at June 30, 2012		2,292,060		$	1.07		7.08	$	0