Schedule of Financial Information for Operating Segments (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenue from external customers	$ 49,570	$ 53,819	$ 57,989	$ 49,367	$ 60,341	$ 50,173	$ 43,572	$ 34,670	$ 210,745	$ 188,756
(Loss) income before income taxes									(74,541)	(255,143)
Total assets	474,366				540,598				474,366	540,598
Capital expenditures									2,039	2,598
Depreciation and amortization									34,605	44,282
Oilfield and Industrial Technologies and Services
Segment Reporting Information [Line Items]
Revenue from external customers									178,609	165,557
Operating Segment | Oilfield and Industrial Technologies and Services
Segment Reporting Information [Line Items]
Revenue from external customers									178,609	165,557
(Loss) income before income taxes									(77,264)	(255,097)
Total assets	456,416				524,952				456,416	524,952
Capital expenditures									1,093	2,371
Depreciation and amortization									33,452	43,005
Operating Segment | Environmental Technologies and Services
Segment Reporting Information [Line Items]
Revenue from external customers									32,136	23,199
(Loss) income before income taxes									2,723	(46)
Total assets	$ 17,950				$ 15,646				17,950	15,646
Capital expenditures									946	227
Depreciation and amortization									$ 1,153	$ 1,277