Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2015

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, 2015 and 2014 are as follows:

	Three Months Ended March 31,
	2015			2014
Expected dividends		0	%		0	%
Expected volatility		131	%		126	%
Risk free interest rate		2.03	%		1.57	%
Expected life of option		10 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, 2015, and for the year ended December 31, 2014, is as follows:

					Weighted
					Average
			Weighted		Remaining	Aggregate
			Average Exercise		Contractual	Intrinsic
	Options		Price		Life	Value
Balance - December 31, 2013		3,909,580	$	1.78	5.59 years	$	785,000
Granted		2,382,500	$	2.36
Exercised		(6,583)	$	0.58
Forfeited		(304,391)	$	1.93
Balance - December 31, 2014		5,981,106	$	2.01	5.80 years	$	685,000
Granted		550,000	$	1.54
Exercised		-	$	-
Forfeited		-	$	-
Balance - March 31, 2015 - outstanding		6,531,106	$	1.97	5.79 years	$	2,628,000
Balance - March 31, 2015 - exercisable		4,168,043	$	1.89	4.98 years	$	1,939,000
Grant date fair value of options granted - March 31, 2015			$	817,000
Weighted average grant date fair value - March 31, 2015			$	1.49
Grant date fair value of options granted - December 31, 2014			$	4,974,000
Weighted average grant date fair value - December 31, 2014			$	2.09