Stock Purchase Warrants (Tables)

6 Months Ended

Jun. 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:

	June 30,			March 31,			December 31,			Issuance
	2015			2015			2014			Date
Closing stock price	$	2.85		$	2.19		$	1.46		$	1.75
Expected dividends		0	%		0	%		0	%		0	%
Expected volatility		90	%		90	%		90	%		95	%
Risk free interest rate		1.41	%		1.26	%		1.59	%		1.39	%
Expected life of warrant		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		8,047
Balance at June 30, 2015	$	14,803

Schedule Of Warrant Activity [Table Text Block]

A summary of warrant activity for the Company for the six months ended June 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	-	$	-
Forfeited	(61,207)	$	3.30
Balance at June 30, 2015	7,913,587	$	1.79

Schedule Of Warrant Outstanding and Exercisable [Table Text Block]

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

				Weighted Average
Exercise		Warrants	Warrants	Remaining	Aggregate
Price		Outstanding	Exercisable	Contractual Life	Intrinsic Value
$	1.60	316,522	316,522	2.32 years	$	396,000
$	1.75	7,029.808	7,029,808	4.28 years	$	7,732,000
$	2.22	517,257	517,257	1.41 years	$	326,000
$	3.75	50,000	50,000	0.63 years	$	-
$	1.79	7,913,587	7,913,587	3.99 years	$	8,454,000