Schedule of Financial Information for Operating Segments (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Revenue from external customers	$ 43,099	$ 57,989	$ 90,557	$ 107,356
(Loss) income before income taxes	(16,205)	(14,805)	(36,199)	(37,077)
Depreciation and amortization	7,709	8,944	15,510	17,969
Oilfield and Industrial Technologies and Services
Segment Reporting Information [Line Items]
Revenue from external customers	35,913	49,788	76,000	92,256
Operating Segment \| Oilfield and Industrial Technologies and Services
Segment Reporting Information [Line Items]
Revenue from external customers	35,913	49,788	76,000	92,256
(Loss) income before income taxes	(16,502)	(15,545)	(36,768)	(38,312)
Depreciation and amortization	7,432	8,647	14,965	17,383
Operating Segment \| Environmental Technologies and Services
Segment Reporting Information [Line Items]
Revenue from external customers	7,186	8,201	14,557	15,100
(Loss) income before income taxes	297	740	569	1,235
Depreciation and amortization	$ 277	$ 297	$ 545	$ 586

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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