Annual report pursuant to Section 13 and 15(d)

Income Taxes - Narrative (Details)

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Income Taxes - Narrative (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Income Taxes    
Federal corporate tax rate 21.00% 35.00%
Uncertain tax positions $ 0  
Income tax related interest or penalties assessed or recorded $ 0