Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 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 months ended March 31, 2014 and 2013 are as follows:

	Three Months Ended March 31,
	2014			2013
Expected dividends		0	%		0	%
Expected volatility		126	%		148	%
Risk free interest rate		1.57	%		0.77	%
Expected life of option		5 years			5 years
Expected forfeitures		0	%		0	%

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

A summary of stock option activities as of March 31, 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		587,500	$	2.73
Exercised		(6,583)	$	0.58
Forfeited		-	$	-
Balance – March 31, 2014 - outstanding		4,490,497	$	1.91	5.55 years	$	3,183,000
Balance – March 31, 2014 - exercisable		3,202,164	$	1.72	5.08 years	$	2,946,000
Grant date fair value of options granted - 2014			$	1,358,000
Weighted average grant date fair value - 2014			$	2.31
Grant date fair value of options granted - 2013			$	350,000
Weighted average grant date fair value - 2013			$	1.57