Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Details Narrative)

v3.8.0.1
Summary of Significant Accounting Policies (Details Narrative)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2017
USD ($)
Sep. 30, 2017
USD ($)
Jun. 30, 2017
USD ($)
Mar. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
[1]
Sep. 30, 2016
USD ($)
Jun. 30, 2016
USD ($)
Mar. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2017
USD ($)
Segment
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Number of operating segment | Segment                   1    
Range of discount rates                   18.60%    
Research and development | $ $ 1,103 $ 1,393 $ 1,255 $ 2,071 $ 93,876 $ 2,093 $ 2,368 $ 3,342 $ 38,700 $ 5,822 $ 101,679 $ 47,261
Minimum [Member]                        
Property and equipment, estimated useful lives                   3 years    
Maximum [Member]                        
Property and equipment, estimated useful lives                   5 years    
[1] Includes impairment charge for the company's IPR&D asset of $92,369,000