Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details)

v3.4.0.3
Fair Value Measurements (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Mar. 31, 2015
Dec. 31, 2014
Assets:        
Cash and cash equivalents $ 10,242 $ 9,276 $ 14,257 $ 3,970
Total assets 10,242 9,276    
Liabilities:        
Warrants potentially settleable in cash 2,807 4,115    
Total liabilities 2,807 4,115    
Unobservable Inputs (Level 3) [Member]        
Liabilities:        
Warrants potentially settleable in cash 2,807 4,115    
Total liabilities 2,807 4,115    
Quoted Prices in Active Markets (Level 1) [Member]        
Assets:        
Cash and cash equivalents 10,242 9,276    
Total assets $ 10,242 $ 9,276