Stock Purchase Warrants (Tables)

3 Months Ended

Mar. 31, 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
	March 31,			December 31,			Issuance			March 31,			December 31,			Issuance
	2017			2016			Date			2017			2016			Date
Closing stock price	$	0.63		$	0.76		$	0.89		$	0.63		$	0.76		$	0.89
Expected dividends		0	%		0	%		0	%		0	%		0	%		0	%
Expected volatility		90	%		85	%		85	%		85	%		90	%		85	%
Risk free interest rate		1.64	%		1.67	%		1.58	%		0.97	%		0.85	%		0.81	%
Expected life of warrant		3.64 years			3.9 years			4 years			0.75 years			1.0 years			1.1 years

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

	March 31,			December 31,			Issuance
	2017			2016			Date
Closing stock price	$	0.63		$	0.76		$	1.75
Expected dividends		0	%		0	%		0	%
Expected volatility		0.85	%		95	%		95	%
Risk free interest rate		1.4	%		1.41	%		1.39	%
Expected life of warrant		2.55 years			2.79 years			5 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, 2016	$	14,821
Change in fair value of warrant liability		(5,090)
Balance at March 31, 2017	$	9,731

Schedule Of Warrant Activity [Table Text Block]

A summary of warrant activity for the Company for the three months ended March 31, 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 March 31, 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 March 31, 2017 is as follows:

						Weighted Average
		Warrants		Warrants		Remaining
Exercise Price		Outstanding		Exercisable		Contractual Life
$	1.43		25,000,000		25,000,000	3.64 years
$	1.60		311,834		311,834	0.57 years
$	1.72		25,000,000		25,000,000	0.75 years
$	1.75		7,029,808		7,029,808	2.53 years
$	1.60		57,341,642		57,341,642	2.23 years