Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2012

Disclosure Of Compensation Related Costs, Share-Based Payments [Abstract]

Share Based Compensation Arrangement By Share Based Payment Award Options And Warrants Vested And Expected To Vest Outstanding And Exercisable [Table Text Block]

The fair value of each option or warrant granted is estimated on the date of grant using the Black-Scholes option-pricing model. The Black-Scholes assumptions used in the months ended June 30, 2012 and 2011 are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
Exercise price		$1.70 - $1.75		$1.73		$1.70 – $2.47		$1.21 – $2.22
Expected dividends		0%		0%		0%		0%
Expected volatility		171%		184%		108% – 174%		184% – 188%
Risk free interest rates		1.89% – 1.92%		2.88%		0.37% – 1.98%		2.81% – 3.58%
Expected life options		10 years		7 years		10 years		5 years – 7 years
Expected forfeitures		0%		0%		0%		0%

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

A summary of stock option activities as of June 30, 2012, and for the year ended December 31, 2011, is as follows:

	Options			Weighted Average  Exercise Price		Weighted Average Remaining Contractual Life		Aggregate Intrinsic Value
Balance – December 31, 2010		2,539,091		$	1.32
Granted		557,002			1.26
Exercised		(23,333	)		0.57
Forfeited or expired		(93,750	)		0.59
Balance – December 31, 2011		2,979,010			1.34
Granted		1,550,000			2.25
Exercised		(334,851	)		0.28
Forfeited or expired		(225,413	)		2.37
Balance – June 30, 2012 – outstanding		3,968,746		$	1.73		7.17 years	$	1,547,000
Balance – June 30, 2012 – exercisable		2,412,748		$	1.54		5.93 years	$	1,252,000