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Loss Per Share - Additional Information (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2018
Mar. 26, 2018
Dec. 31, 2017
Earnings Per Share [Line Items]        
Common stock, shares outstanding 10,266,613 10,266,613   1,000
Common stock shares distributed at spin-off     10,266,613  
Restricted Stock Units (RSUs)        
Earnings Per Share [Line Items]        
Shares excluded from the diluted loss per share calculation 2,145,500 2,145,500