Annual report pursuant to Section 13 and 15(d)

Organization (Details Textual)

v3.6.0.2
Organization (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Jan. 31, 2017
Dec. 31, 2013
Organization [Line Items]          
Retained Earnings (Accumulated Deficit), Total $ (114,861) $ (91,391)      
Cash and Cash Equivalents, at Carrying Value, Total 16,846 19,552 $ 25,190   $ 805
Net Cash Provided by (Used in) Operating Activities, Continuing Operations, Total (24,997) $ (18,269) $ (15,007)    
Unrestricted Cash And Cash Equivalents $ 10,820        
Subsequent Event [Member]          
Organization [Line Items]          
Restricted Cash and Cash Equivalents       $ 6,026