Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2014

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 Black-Scholes assumptions used in the three and six months ended June 30, 2014 and 2013 are as follows:

	Three Months Ended June 30,			Six Months Ended June 30,
	2014		2013	2014			2013
Exercise price	$2.52 - $2.91		-	$2.52 - $2.91		$	1.74
Expected dividends	0	%	-	0	%		0	%
Expected volatility	106% - 150%		-	106% - 150%			148	%
Risk free interest rate	1.73% - 2.73%		-	1.57% - 2.73%			0.77	%
Expected life of option	5 years – 10 years		-	5 years – 10 years			5 years
Expected forfeitures	0	%	-	0	%		0	%

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

A summary of stock option activities as of June 30, 2014, and for the year ended December 31, 2013, is as follows:

					Weighted
					Average
			Weighted		Remaining		Aggregate
			Average Exercise		Contractual		Intrinsic
	Options		Price		Life		Value
Balance - December 31, 2012		4,453,746	$	1.78		6.43 years	$	1,308,000
Granted		222,500	$	1.69
Exercised		(291,666)	$	0.79
Forfeited		(475,000)	$	2.30
Balance - December 31, 2013		3,909,580	$	1.78		5.59 years	$	785,000
Granted		1,732,500	$	2.63
Exercised		(6,583)	$	0.58
Forfeited		(304,391)	$	1.93
Balance – June 30, 2014 - outstanding		5,331,106	$	2.05		6.26 years	$	920,000
Balance – June 30, 2014 - exercisable		3,340,280	$	1.77		5.36 years	$	919,000
Grant date fair value of options granted – June 30, 2014			$	4,088,000
Weighted average grant date fair value – June 30, 2014			$	2.36
Grant date fair value of options granted – December 31, 2013			$	350,000
Weighted average grant date fair value – December 31, 2013			$	1.57