Quarterly report pursuant to Section 13 or 15(d)

Stock Purchase Warrants (Details 1)

v3.7.0.1
Stock Purchase Warrants (Details 1) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]        
Beginning Balance     $ 14,821  
Change in fair value of warrant liability $ 2,159 $ 3,513 7,249 $ 3,015
Ending Balance $ 7,573   $ 7,573