XML 55 R46.htm IDEA: XBRL DOCUMENT v3.10.0.1
Income Taxes (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Income Taxes (Textual)          
Effective tax rate 0.00% 0.00% 0.00% 0.00%  
U.S. federal corporate tax rate     21.00%   35.00%