Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details)

v3.2.0.727
Fair Value Measurements (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Jun. 30, 2014
Dec. 31, 2013
Assets:        
Cash and cash equivalents $ 15,781 $ 3,970 $ 4,074 $ 1,034
Marketable securities   1,975    
Total assets $ 15,781 5,945    
Liabilities:        
Warrants potentially settleable in cash 6,130 8,464    
Total liabilities 6,130 8,464    
Quoted Prices in Active Markets (Level 1) [Member]        
Assets:        
Cash and cash equivalents 15,781 $ 3,970    
Marketable securities        
Total assets $ 15,781 $ 3,970    
Liabilities:        
Warrants potentially settleable in cash        
Total liabilities        
Significant Other Observable Inputs (Level 2) [Member]        
Assets:        
Cash and cash equivalents        
Marketable securities   $ 1,975    
Total assets   $ 1,975    
Liabilities:        
Warrants potentially settleable in cash        
Total liabilities        
Unobservable Inputs (Level 3) [Member]        
Assets:        
Cash and cash equivalents        
Marketable securities        
Total assets        
Liabilities:        
Warrants potentially settleable in cash $ 6,130 $ 8,464    
Total liabilities $ 6,130 $ 8,464