Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Tables)

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Fair Value Measurements (Tables)
 6 Months Ended 12 Months Ended
Jun. 30, 2015
Dec. 31, 2014
Schedule of Fair Value, Financial Assets and Liabilities [Table Text Block]
    Fair value measurement using  
          Significant     Significant        
    Quoted prices in     other     unobservable        
    active markets     observable     inputs        
($ rounded to nearest thousand)   (Level 1)     inputs (Level 2)     (Level 3)     Total  
Balance at June 30, 2015                        
Assets:                        
Cash and cash equivalents $ 2,371,000   $   —   $   —   $ 2,371,000  
Liabilities:                        
Warrant liability $   —   $   —   $ 2,975,000   $ 2,975,000  
    Fair value measurement using  
          Significant     Significant        
    Quoted prices in     other     unobservable        
    active markets     observable     inputs        
($ rounded to nearest thousand)   (Level 1)     inputs (Level 2)     (Level 3)     Total  
Balance at December 31, 2014                        
Assets:                        
Cash and cash equivalents $ 4,220,000   $   —   $   —   $ 4,220,000  
Liabilities:                        
Warrant liability $   —   $   —   $ 4,633,000   $ 4,633,000  
Schedule of Reconciliation of Warrant Liability [Table Text Block]
($ rounded to nearest thousand)                                                                                                          Warrant Liability  
Balance at December 31, 2013 $ 1,711,000  
Issuance of additional warrants   4,416,000  
Exercise of warrants   (331,000 )
Change in fair value of warrant liability   (1,163,000 )
Balance at December 31, 2014   4,633,000  
Issuance of additional warrants   -  
Exercise of warrants   -  
Change in fair value of warrant liability   (1,658,000 )
Balance at June 30, 2015 $ 2,975,000