SUMMARY OF CRITICAL ACCOUNTING POLICIES AND USE OF ESTIMATES (Tables)
9 Months Ended 12 Months Ended
Sep. 30, 2014
Dec. 31, 2013
Accounting Policies [Abstract]    
Schedule of Weighted Average Number of Shares [Table Text Block]
The following potentially dilutive securities have been excluded from the computations of weighted average shares outstanding as of September 30, 2014 and 2013, as they would be anti-dilutive:
 
 
 
Nine months ended September 30,
 
 
 
2014
 
2013
 
Shares underlying options outstanding
 
 
8,425,095
 
 
6,011,023
 
Shares underlying warrants outstanding
 
 
19,897,928
 
 
10,266,597
 
Shares underlying convertible notes outstanding
 
 
268,117
 
 
259,296
 
 
 
 
28,591,140
 
 
16,536,916
 
The following potentially dilutive securities have been excluded from the computations of weighted average shares outstanding as of December 31, 2013 and 2012, as they would be anti-dilutive:
 
 
 
Year Ended December 31,
 
 
 
2013
 
2012
 
Shares underlying options outstanding
 
 
6,050,623
 
 
4,674,628
 
Shares underlying warrants outstanding
 
 
10,216,597
 
 
8,513,984
 
Shares underlying convertible notes outstanding
 
 
261,519
 
 
252,698
 
 
 
 
16,528,739
 
 
13,441,310
 
Fair Value, Liabilities Measured on Recurring Basis [Table Text Block]  
The Company previously had recorded a warrant derivative liability for warrants with anti-dilution provisions, which all the respective warrants were either exercised or expired as of December 31, 2013. The table below summarizes the fair values of our financial liabilities as of December 31, 2012 (in thousands): 
 
 
 
Fair Value at
 
 
 
 
 
 
 
 
 
December 31,
 
Fair Value Measurement Using
 
 
 
2012
 
Level 1
 
Level 2
 
Level 3
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Warrant derivative liability
 
$
1,176
 
$
—
 
$
—
 
$
1,176
 
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Table Text Block]  
The reconciliation of the warrant derivative liability measured at fair value on a recurring basis using unobservable inputs (Level 3) is as follows (in thousands):
 
 
 
2013
 
2012
 
Balance at beginning of year
 
$
1,176
 
$
1,734
 
Loss (gain) on change in fair value of warrant liability
 
 
(1,096)
 
 
50
 
Reclassification to equity upon exercise of warrants
 
 
(80)
 
 
(608)
 
Balance at end of year
 
$
—
 
$
1,176