Summary of Significant Accounting Policies - Goodwill (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)
Goodwill [Roll Forward]
Balance as of December 31, 2019	$ 0
Additions to goodwill	19,089
Goodwill impairment	(19,089)
Balance as of December 31, 2020	0
Well Servicing
Goodwill [Roll Forward]
Balance as of December 31, 2019	0
Additions to goodwill	10,565
Goodwill impairment	(10,565)
Balance as of December 31, 2020	0
Water Logistics
Goodwill [Roll Forward]
Balance as of December 31, 2019	0
Additions to goodwill	8,524
Goodwill impairment	(8,524)
Balance as of December 31, 2020	0
Completion & Remedial
Goodwill [Roll Forward]
Balance as of December 31, 2019	0
Additions to goodwill	0
Goodwill impairment	0
Balance as of December 31, 2020	$ 0