Quarterly report pursuant to Section 13 or 15(d)

Going Concern (Details Textual)

v3.8.0.1
Going Concern (Details Textual) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Mar. 31, 2017
Dec. 31, 2016
Retained Earnings (Accumulated Deficit) $ (196,545) $ (194,170)    
Cash and Cash Equivalents, at Carrying Value, Total $ 11,037 $ 17,116 $ 13,471 $ 19,055