Quarterly report pursuant to Section 13 or 15(d)

Organization (Details Textual)

v3.4.0.3
Organization (Details Textual) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Dec. 31, 2014
Organization [Line Items]        
Retained Earnings (Accumulated Deficit), Total $ (95,042)   $ (91,391)  
Cash and Cash Equivalents, at Carrying Value, Total 12,314 $ 21,133 $ 19,552 $ 25,190
Net Cash Provided by (Used in) Operating Activities, Continuing Operations, Total (6,789) $ (3,828)    
Average Monthly Cash Burn $ 1,800