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Income Taxes - Summary of Reconciliation Between Federal Tax Rate (Details)
12 Months Ended
Dec. 22, 2017
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]      
Statutory Federal rates 35.00% 21.00% 34.00%
Increase (decrease) in income tax rate resulting from Tax on foreign activities   0.00% (2.00%)
Increase (decrease) in income tax rate resulting from Other, net (primarily permanent differences)   0.00% (1.00%)
Increase (decrease) in income tax rate resulting from Valuation allowance   (21.00%) (37.00%)
Effective income tax rates   0.00% (2.00%)