Annual report pursuant to Section 13 and 15(d)

Customer Concentration - Schedule of Concentration Credit Risk Percentage (Details)

v3.20.1
Customer Concentration - Schedule of Concentration Credit Risk Percentage (Details) - USD ($)
$ in Thousands
4 Months Ended 12 Months Ended
Apr. 21, 2017
Apr. 20, 2017
Dec. 31, 2018
Dec. 31, 2017
Revenues     $ 384,755 $ 215,509
Predecessor [Member]        
Revenues   $ 35,191    
Revenue [Member] | Customer A [Member]        
Revenues     $ 47,664
Concentration risk percentage     12.00% 0.00%
Revenue [Member] | Customer B [Member]        
Revenues     $ 49,307
Concentration risk percentage     0.00% 21.00%
Revenue [Member] | Customer C [Member]        
Revenues     $ 31,512 $ 29,972
Concentration risk percentage     8.00% 13.00%
Revenue [Member] | Customer D [Member] | Predecessor [Member]        
Revenues $ 7,382      
Concentration risk percentage 21.00%      
Revenue [Member] | Customer E [Member] | Predecessor [Member]        
Revenues $ 6,752      
Concentration risk percentage 19.00%      
Revenue [Member] | Customer F [Member] | Predecessor [Member]        
Revenues $ 4,048      
Concentration risk percentage 12.00%      
Accounts Receivable [Member] | Customer B [Member]        
Concentration risk percentage     0.00% 30.00%
Accounts Receivable     $ 18,477
Accounts Receivable [Member] | Customer C [Member]        
Concentration risk percentage     0.00% 12.00%
Accounts Receivable     $ 7,513
Accounts Receivable [Member] | Customer D [Member]        
Concentration risk percentage     11.00% 0.00%
Accounts Receivable     $ 8,334
Accounts Receivable [Member] | Customer G [Member]        
Concentration risk percentage     10.00% 0.00%
Accounts Receivable     $ 7,724