Quarterly report pursuant to Section 13 or 15(d)

Going Concern (Details Textual)

v3.7.0.1
Going Concern (Details Textual) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Mar. 31, 2016
Dec. 31, 2015
Retained Earnings (Accumulated Deficit) $ (174,880) $ (172,034)    
Cash and Cash Equivalents, at Carrying Value, Total $ 13,471 $ 19,055 $ 15,100 $ 20,818