Quarterly report pursuant to Section 13 or 15(d)

Organization (Details Textual)

v3.10.0.1
Organization (Details Textual) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Dec. 31, 2016
Organization [Line Items]        
Retained Earnings (Accumulated Deficit), Total $ (160,031)   $ (144,154)  
Cash and Cash Equivalents, at Carrying Value 13,890 $ 10,701 $ 27,813 $ 16,846
Net Cash Provided by (Used in) Operating Activities (12,804) $ (16,859)    
Restricted Cash and Cash Equivalents 7,366      
Unrestricted Cash $ 6,524