Quarterly report pursuant to Section 13 or 15(d)

Acquisitions - Pro Forma Stingray Acquisitions (Details)

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Acquisitions - Pro Forma Stingray Acquisitions (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
SR Energy      
Business Acquisition [Line Items]      
Revenues $ 16,034   $ 11,572
Net loss (1,586)   (1,626)
Depreciation 2,800   3,400
Cementing      
Business Acquisition [Line Items]      
Revenues 5,131   7,500
Net loss (806)   (1,963)
Depreciation 1,000   4,100
Stingray Acquisitions      
Business Acquisition [Line Items]      
Revenues   $ 18,333  
Net loss   $ (1,612)  
Eliminations | SR Energy      
Business Acquisition [Line Items]      
Revenues $ 1,600   $ 600