Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2016

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 years ended December 31, 2016, 2015 and 2014 are as follows:

	Year ended December 31,
	2016		2015		2014
Exercise price	$	0.80 – $2.66	$	1.54 – $2.76	$	1.46 – $2.91
Expected dividends		0%		0%		0%
Expected volatility		96% – 123%		88% – 131%		101% – 150%
Risk free interest rate		1.40% – 2.13%		1.32% – 2.19%		1.57% – 2.73%
Expected life of option		7 years		5 years – 10 years		5 years – 10 years

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

A summary of stock option activities for the years ended December 31, 2016, 2015 and 2014, is as follows:

			Weighted		Weighted Average	Aggregate
			Average Exercise		Remaining	Intrinsic
	Options		Price		Contractual 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		$	8,000
Forfeited		(304,391)	$	1.93
Balance - December 31, 2014		5,981,106	$	2.01	5.80 years	$	685,000
Granted		3,781,666	$	2.37
Exercised		(35,008)	$	1.16		$	44,000
Expired		(483,332)	$	2.48
Forfeited		(302,502)	$	1.91
Balance - December 31, 2015		8,941,930	$	2.14	5.67 years	$	2,900,000
Granted		3,861,425	$	0.98
Exercised		(445,334)	$	1.83		$	137,488
Expired		(338,529)	$	1.96
Forfeited		(383,265)	$	2.26
Balance - December 31, 2016 - outstanding		11,636,227	$	1.77	5.49 years	$	194,355
Balance - December 31, 2016 - exercisable		6,193,649	$	2.02	4.49 years	$	194,355
Grant date fair value of options granted -  December 31, 2016			$	3,091,000
Weighted average grant date fair value - December 31, 2016			$	0.80
Grant date fair value of options granted - December 31, 2015			$	7,974,000
Weighted average grant date fair value - December 31, 2015			$	2.12

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Table Text Block]

The options outstanding and exercisable at December 31, 2016 are as follows:

Options Outstanding								Options Exercisable
						Weighted						Weighted
				Weighted		Average				Weighted		Average
				Average		Remaining				Average		Remaining
Range of				Exercise		Contractual				Exercise		Contractual
Exercise Price		Options		Price		Life		Options		Price		Life
$	0.09 – $2.00		5,769,987	$	1.00		5.37 years		2,324,504	$	1.19		3.17 years
$	2.01 – $3.00		5,820,416		2.50		5.64 years		3,823,321		2.49		5.33 years
$	3.01 – $6.00		45,824		5.24		.62 years		45,824		5.24		.62 years
$	0.09 – $6.00		11,636,227	$	1.77		5.49 years		6,193,649	$	2.02		4.49 years

The options outstanding and exercisable at December 31, 2015 are as follows:

Options Outstanding								Options Exercisable
						Weighted						Weighted
				Weighted		Average				Weighted		Average
				Average		Remaining				Average		Remaining
Range of				Exercise		Contractual				Exercise		Contractual
Exercise Price		Options		Price		Life		Options		Price		Life
$	0.09 – $2.00		3,029,938	$	1.40		4.12 years		2,363,683	$	1.34		3.38 years
$	2.01 – $3.00		5,866,168		2.50		6.50 years		2,348,247		2.44		5.76 years
$	3.01 – $6.00		45,824		5.24		1.62 years		45,824		5.24		1.62 years
$	0.09 – $6.00		8,941,930	$	2.14		5.67 years		4,757,754	$	1.92		4.54 years

The options outstanding and exercisable at December 31, 2014 are as follows:

Options Outstanding								Options Exercisable
						Weighted						Weighted
				Weighted		Average				Weighted		Average
				Average		Remaining				Average		Remaining
Range of				Exercise		Contractual				Exercise		Contractual
Exercise Price		Options		Price		Life		Options		Price		Life
$	0.09 – $2.00		2,703,280	$	1.37		4.33 years		2,018,074	$	1.28		3.73 years
$	2.01 – $3.00		3,232,002		2.49		7.08 years		1,829,298		2.40		6.73 years
$	3.01 – $6.00		45,824		5.24		2.62 years		45,824		5.24		2.62 years
$	0.09 – $6.00		5,981,106	$	2.01		5.80 years		3,893,196	$	1.85		5.12 years

Share-based Compensation Arrangement by Share-based Payment Award, Options, Non Vested and Expected to Vest Exercisable [Table Text Block]

The following is a summary of the Company’s non-vested stock options at December 31, 2016:

			Weighted
	Unvested Stock		Average Grant
	Options		Date Fair Value
Balance - December 31, 2013		756,043	$	2.17
Granted		2,382,500	$	2.09
Vested/Exercised		(1,050,633)	$	2.35
Forfeited/Cancelled		-	$	-
Balance - December 31, 2014		2,087,910	$	2.30
Granted		3,781,666	$	2.12
Vested/Exercised		(1,382,898)	$	2.02
Forfeited/Cancelled		(302,502)	$	1.92
Balance - December 31, 2015		4,184,176	$	1.97
Granted		3,861,425	$	0.80
Vested/Exercised		(2,219,758)	$	1.87
Forfeited/Cancelled		(383,265)	$	2.26
Non-vested - December 31, 2016		5,442,578	$	1.18
Weighted average remaining period for vesting		1.99

Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Table Text Block]

The assumptions used by the Company are summarized in the following table:

	Series A						Series B
	Issuance			December 31,			Issuance			December 31,
	Date			2016			Date			2016
Closing stock price	$	0.89		$	0.76		$	0.89		$	0.76
Expected dividends		0	%		0	%		0	%		0	%
Expected volatility		85.0	%		85.0	%		85.0	%		90.0	%
Risk free interest rate		1.58	%		1.67	%		0.81	%		0.85	%
Expected life of warrant		4 years			3.9 years			1.1 years			1 years

The assumptions used by the Company are summarized in the following table:

	Issuance			December 31,
	Date			2016
Closing stock price	$	1.75		$	0.76
Expected dividends		0	%		0	%
Expected volatility		95	%		95	%
Risk free interest rate		1.39	%		1.41	%
Expected life of warrant		5 years			2.79 years

Schedule Of Estimated Fair Value Of The Warrant Liability [Table Text Block]

The following table summarizes the estimated fair value of the warrant liability (in thousands) :

Balance at December 31, 2014	$	6,756
Change in fair value of warrant liability		3,811
Balance at December 31, 2015		10,567
Warrants Liability		15,667
Change in fair value of warrant liability		(11,412)
Balance at December 31, 2016	$	14,821

Schedule of Warrant Activity [Table Text Block]

A summary of warrant activity for the Company for the years ended December 31, 2016 and 2015 is as follows:

	Number of		Weighted Average
	Warrants		Exercise Price
Balance at December 31, 2014		7,974,794	$	1.80
Granted		-	$	-
Exercised		(2,446)	$	1.60
Forfeited		(63,449)	$	1.79
Balance at December 31, 2015		7,908,899	$	1.79
Granted		50,000,000	$	1.58
Exercised		-	$	-
Forfeited		(567,257)	$	2.35
Balance at December 31, 2016		57,341,642	$	1.60

Schedule of Warrant Outstanding and Exercisable [Table Text Block]

A summary of all outstanding and exercisable warrants as of December 31, 2016 is as follows:

						Weighted Average
		Warrants		Warrants		Remaining
Exercise Price		Outstanding		Exercisable		Contractual Life
$	1.60		311,834		311,834	0.82 years
$	1.43		25,000,000		25,000,000	3.88 years
$	1.72		25,000,000		25,000,000	1.00 years
$	1.75		7,029,808		7,029,808	2.78 years
$	1.77		57,341,642		57,341,642	2.47 years