Stock Purchase Warrants (Tables)

9 Months Ended

Sep. 30, 2017

Stock Purchase Warrants [Abstract]

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
	September 30,			December 31,			Issuance			September 30,			December 31,			Issuance
	2017			2016			Date			2017			2016			Date
Closing stock price	$	0.93		$	0.76		$	0.89		$	0.93		$	0.76		$	0.89
Expected dividends		0	%		0	%		0	%		0	%		0	%		0	%
Expected volatility		80	%		85	%		85	%		70	%		90	%		85	%
Risk free interest rate		1.64	%		1.67	%		1.58	%		1.06	%		0.85	%		0.81	%
Expected life of warrant (years)		3.1			3.9			4.0			0.3			1.0			1.1

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

	September 30,			December 31,			Issuance
	2017			2016			Date
Closing stock price	$	0.93		$	0.76		$	1.75
Expected dividends		0	%		0	%		0	%
Expected volatility		85	%		95	%		95	%
Risk free interest rate		1.48	%		1.41	%		1.39	%
Expected life of warrant (years)		2.0			2.8			5.0

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, 2016	$	14,821
Change in fair value of warrant liability		(2,157)
Balance at September 30, 2017	$	12,664

Schedule Of Warrant Activity [Table Text Block]

A summary of warrant activity for the Company for the nine months ended September 30, 2017 and for the year ended December 31, 2016 is as follows:

	Number of		Weighted Average
	Warrants		Exercise Price
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
Granted		-		-
Exercised		-		-
Forfeited		-		-
Balance at September 30, 2017		57,341,642	$	1.60

Schedule Of Warrant Outstanding and Exercisable [Table Text Block]

A summary of all outstanding and exercisable warrants as of September 30, 2017 is as follows:

						Weighted Average
		Warrants		Warrants		Remaining
Exercise Price		Outstanding		Exercisable		Contractual Life (years)
$	1.43		25,000,000		25,000,000		3.14
$	1.60		311,834		311,834		0.07
$	1.72		25,000,000		25,000,000		0.25
$	1.75		7,029,808		7,029,808		2.03
$	1.60		57,341,642		57,341,642		1.73