XML 89 R61.htm IDEA: XBRL DOCUMENT v3.19.1
Income Taxes (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
US Corporate income tax rate 21.00% 34.00% 34.00%
Effective tax rate 0.00% 0.00% 0.00%
Income tax benefit (expense) $ 0    
Maximum      
US Corporate income tax rate   35.00%