Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 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 and nine months ended September 30, 2015 and 2014 are as follows:

	Three Months Ended September 30,		Nine Months Ended September 30,
	2015	2014	2015	2014
Exercise price	-	$1.71 - $1.78	$1.54 - $2.73	$1.71 - $2.91
Expected dividends	-	0%	0%	0%
Expected volatility	-	101% - 107%	88% - 131%	101% - 150%
Risk free interest rate	-	1.62% - 1.78%	1.32% - 2.19%	1.62% - 1.78%
Expected life of option	-	5 years	5 years - 10 years	5 years - 10 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 September 30, 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		1,800,000	$	2.00
Exercised		(18,342)	$	0.81
Expired		(8,333)	$	2.73
Forfeited		(302,502)	$	1.92
Balance - September 30, 2015 - outstanding		7,451,929	$	2.01	5.27 years	$	2,732,000
Balance - September 30, 2015 - exercisable		4,812,626	$	1.93	4.14 years	$	2,104,000
Grant date fair value of options granted - September 30, 2015			$	3,245,000
Weighted average grant date fair value - September 30, 2015			$	1.80
Grant date fair value of options granted - December 31, 2014			$	4,974,000
Weighted average grant date fair value - December 31, 2014			$	2.09