Annual report pursuant to Section 13 and 15(d)

Allocation (Details Textual)

v3.8.0.1
Allocation (Details Textual) - USD ($)
$ in Millions
1 Months Ended 11 Months Ended 12 Months Ended
Jun. 30, 2017
Jun. 26, 2017
Dec. 31, 2015
Dec. 31, 2017
Dec. 31, 2016
Allocated Share-based Compensation Expense     $ 0.1 $ 0.2 $ 0.3
Share Based Compensation Allocation Percentage 100.00%        
IPO [Member]          
Allocated Share-based Compensation Expense   $ 0.6      
Research and Development Expense [Member]          
Share Based Compensation Allocation Percentage       50.00%  
General and Administrative Expense [Member]          
Share Based Compensation Allocation Percentage       50.00%