Business Segment Information - Financial Information with Respect to Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Revenues	$ 94,347	$ 128,403
Depreciation and amortization	10,797	14,765
Capital expenditures	331	5,595
Total assets	331,099		$ 349,073
Continuing Operations
Segment Reporting Information [Line Items]
Revenues	94,347	128,403
Costs of services	77,171	102,175
Segment profits	17,176	26,228
Depreciation and amortization	10,797	14,765
Capital expenditures	331	5,595
Total assets	327,905	481,374
Discontinued Operations
Segment Reporting Information [Line Items]
Revenues	0	95
Costs of services	1,393	1,520
Segment profits	(1,393)	(1,425)
Depreciation and amortization	0	0
Capital expenditures	0	0
Total assets	3,194	10,346
Corporate and Other | Continuing Operations
Segment Reporting Information [Line Items]
Revenues	0	0
Costs of services	0	0
Segment profits	0	0
Depreciation and amortization	1,075	1,559
Capital expenditures	0	26
Total assets	139,565	219,159
Well Servicing | Continuing Operations
Segment Reporting Information [Line Items]
Revenues	54,807	58,141
Well Servicing | Operating Segments | Continuing Operations
Segment Reporting Information [Line Items]
Revenues	54,807	58,141
Costs of services	44,124	48,434
Segment profits	10,683	9,707
Depreciation and amortization	1,973	2,455
Capital expenditures	0	2,070
Total assets	37,708	47,032
Water Logistics | Continuing Operations
Segment Reporting Information [Line Items]
Revenues	27,814	44,381
Water Logistics | Operating Segments | Continuing Operations
Segment Reporting Information [Line Items]
Revenues	27,814	44,381
Costs of services	24,287	33,105
Segment profits	3,527	11,276
Depreciation and amortization	5,327	6,681
Capital expenditures	197	2,770
Total assets	97,041	134,893
Completion & Remedial Services | Continuing Operations
Segment Reporting Information [Line Items]
Revenues	11,726	25,881
Completion & Remedial Services | Operating Segments | Continuing Operations
Segment Reporting Information [Line Items]
Revenues	11,726	25,881
Costs of services	8,760	20,636
Segment profits	2,966	5,245
Depreciation and amortization	2,422	4,070
Capital expenditures	134	729
Total assets	$ 53,591	$ 80,290