Stock Purchase Warrants (Tables)

9 Months Ended

Sep. 30, 2015

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:

	September 30, 2015			June 30, 2015			March 31, 2015			December 31, 2014			Issuance Date
Closing stock price	$	2.27		$	2.85		$	2.19		$	1.46		$	1.75
Expected dividends		0	%		0	%		0	%		0	%		0	%
Expected volatility		85	%		90	%		90	%		90	%		95	%
Risk free interest rate		1.15	%		1.41	%		1.26	%		1.59	%		1.39	%
Expected life of warrant		4.04 years			4.30 years			4.55 years			4.79  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, 2014	$	6,756
Change in fair value of warrant liability		3,906
Balance at September 30, 2015	$	10,662

Schedule Of Warrant Activity [Table Text Block]

A summary of warrant activity for the Company for the nine months ended September 30, 2015 and for the year ended December 31, 2014 is as follows:

			Weighted Average
	Number of Warrants		Exercise Price
Balance at December 31, 2013		1,632,501	$	1.99
Granted		7,029,808	$	1.75
Exercised		(232,619)	$	1.47
Forfeited		(454,896)	$	1.88
Balance at December 31, 2014		7,974,794	$	1.80
Granted		-	$	-
Exercised		(2,448)	$	-
Forfeited		(63,447)	$	3.24
Balance at September 30, 2015		7,908,899	$	1.79

Schedule Of Warrant Outstanding and Exercisable [Table Text Block]

A summary of all outstanding and exercisable warrants as of September 30, 2015 is as follows:

						Weighted Average
Exercise		Warrants		Warrants		Remaining	Aggregate
Price		Outstanding		Exercisable		Contractual Life	Intrinsic Value
$	1.60		311,834		311,834	2.07 years	$	212,000
$	1.75		7,029.808		7,029,808	4.04 years	$	3,656,000
$	2.22		517,257		517,257	1.16 years	$	26,000
$	3.75		50,000		50,000	0.38 years	$	-
$	1.79		7,908,899		7,908,899	3.74 years	$	3,894,000