FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Dec. 31, 2015

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

The Company had no assets or liabilities that were measured at fair value as of December 31, 2014.

	As of December 31,
	2015		Fair Value Hierarchy at December 31, 2015
			Quoted prices in		Significant other		Significant
	Total carrying and		active markets		observable inputs		unobservable
	estimated fair value		(Level 1)		(Level 2)		inputs (Level 3)
Liabilities:
Series D Preferred Stock Derivative Liability	$	6,529	$	-	$		$	6,529
Derivative liability related to Hercules Warrants	$	84	$	-	$	-	$	84

Hercules warrant [Member]

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

The following table sets forth a summary of changes in the estimated fair value of the Company’s Hercules Warrant derivative liability for the period from January 1, 2015 through December 31, 2015 ($ in thousands):

	Fair Value Measurements of
	Hercules
	Common Stock Warrants
	Using Significant
	Unobservable Inputs (Level 3)
Balance at January 1, 2015		—
Warrants issued with July 2015 debt financing	$	315
Change in estimated fair value of liability classified warrants		(231)
Balance at December 31, 2015	$	84

March 2014 Warrants [Member]

Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis [Table Text Block]

The following table summarizes the changes in the Company’s derivative liability measured at fair value using significant unobservable inputs (Level 3) from January 1, 2014 through December 31, 2014 ($ in thousands): 

	Level 3
Balance at January 1, 2014	$	-
Derivative warrants issued to investors in connection with the March 2014 Financing		7,404
Reclassification into additional paid in capital due to Amendment Agreement		(7,882)
Derivative issued in connection with convertible promissory note		670
Settlement of derivative liability of convertible promissory note		(750)
Fair value adjustment at reclassification, included in statement of operations		558
Balance at December 31, 2014	$	-

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

The table below outlines the key inputs in valuing the March 2014 warrants derivative liability.

				As of August 13, 2014
				(Restated
Unobservable inputs	As of March 10, 2014			Warrant Date)
Volatility		82.90	%		74.8	%
Risk free interest rate		0.40% - 0.60	%		0.46% - 0.52	%
Expected term, in years		2.50			2.03-2.08
Dividend yield		0	%		0	%
Probability and timing of down-round triggering event		63.5% for on August 1, 2014; 33.5% for on October 1, 2014; and 3% for every six months from September 10, 2014			63.5% for on September 1, 2014; 33.5% for on October 1, 2014; and 3% for every six months from September 10, 2014
Stock Price	$	3.04		$	4.11

Series D Preferred Stock [Member]

Fair Value Inputs, Assets, Quantitative Information [Table Text Block]

The following table sets forth a summary of changes in the estimated fair value of the Company’s Series D Preferred Stock derivative liability for the period from January 1, 2015 through December 31, 2015 ($ in thousands):

	Fair Value Measurements of
	Series D Preferred Stock
	Derivative Liability
	Using Significant
	Unobservable Inputs (Level 3)
Balance at January 1, 2015		—
Series D Preferred Stock derivative liability at inception- July 28, 2015 ($9.0 million financing)	$	5,930
Series D Preferred Stock derivative liability at inception- September 29, 2015 ($3.0 million financing)		2,077
Series D Preferred Stock conversions		(1,836)
Change in estimate fair value of Series D Preferred Stock derivative liability		358
Balance at December 31, 2015	$	6,529