Annual report pursuant to Section 13 and 15(d)

Acquisitions - Pro Forma Information Chieftain Sand and Proppant LLC (Details)

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Acquisitions - Pro Forma Information Chieftain Sand and Proppant LLC (Details) - Chieftain Acquisition - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Business Acquisition [Line Items]      
Revenues $ 27,617 $ 52,628 $ 22,847
Net income (3,513) 8,379 5,520
Depreciation 5,000 4,900 2,800
Revenues     22,847
Net income     5,655
Intercompany elimination      
Business Acquisition [Line Items]      
Revenues $ 3,700 $ 14,800 $ 12,300