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Debt - Promissory Note (Details) - Successor - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
Current portion of long-term debt $ 2,936 $ 2,849
Senior Secured Notes    
Debt Instrument [Line Items]    
Long-term debt 4,400  
Current portion of long-term debt $ 2,900  
Stated interest rate 4.00%