Quarterly report pursuant to Section 13 or 15(d)

Organization and Summary of Significant Accounting Policies (Details)

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Organization and Summary of Significant Accounting Policies (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Schedule of Organization and Summary of Significant Accounting Policies [Line Items]        
Total warrant liability at December 31, 2014     $ 5,578  
Adjustment to record warrants at fair value $ 1,185 $ 284 4,464 $ 1,148
Total warrant liability at June 30, 2015 $ 10,042   $ 10,042