Geographic Segments - Schedule of Segment Reporting (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Revenues	$ 94,317	$ 99,173
Depreciation and amortization	8,356	8,241
Income (loss) before income taxes	(3,718)	(4,482)
Total long-lived assets	340,389		$ 339,529
Total assets	1,183,729		1,192,510
Intercompany
Segment Reporting Information [Line Items]
Revenues	4,975	3,424
Eliminations
Segment Reporting Information [Line Items]
Revenues	(4,975)	(3,424)
Total long-lived assets	(395,938)		(395,938)
Total assets	(511,371)		(458,682)
Western Hemisphere
Segment Reporting Information [Line Items]
Revenues	56,633	60,126
Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Depreciation and amortization	5,419	5,492
Income (loss) before income taxes	1,579	721
Total long-lived assets	410,204		412,624
Total assets	737,282		708,723
Western Hemisphere | Intercompany
Segment Reporting Information [Line Items]
Revenues	4,091	3,073
Western Hemisphere | Eliminations
Segment Reporting Information [Line Items]
Revenues	0	0
Eastern Hemisphere
Segment Reporting Information [Line Items]
Revenues	26,414	30,229
Eastern Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Depreciation and amortization	1,053	1,211
Income (loss) before income taxes	6,581	5,659
Total long-lived assets	257,363		256,899
Total assets	793,983		788,171
Eastern Hemisphere | Intercompany
Segment Reporting Information [Line Items]
Revenues	144	186
Eastern Hemisphere | Eliminations
Segment Reporting Information [Line Items]
Revenues	0	0
Asia-Pacific
Segment Reporting Information [Line Items]
Revenues	16,245	12,242
Asia-Pacific | Operating Segments
Segment Reporting Information [Line Items]
Depreciation and amortization	1,198	975
Income (loss) before income taxes	5,196	256
Total long-lived assets	68,760		65,944
Total assets	163,835		$ 154,298
Asia-Pacific | Intercompany
Segment Reporting Information [Line Items]
Revenues	740	165
Asia-Pacific | Eliminations
Segment Reporting Information [Line Items]
Revenues	0	0
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Revenues	(4,975)	(3,424)
Depreciation and amortization	686	563
Income (loss) before income taxes	(17,074)	(11,118)
Corporate, Non-Segment | Eliminations
Segment Reporting Information [Line Items]
Revenues	(4,975)	(3,424)
Products | Operating Segments
Segment Reporting Information [Line Items]
Revenues	65,434	71,045
Products | Operating Segments | Transferred at Point in Time
Segment Reporting Information [Line Items]
Revenues	48,325	59,918
Products | Operating Segments | Transferred over Time
Segment Reporting Information [Line Items]
Revenues	17,109	11,127
Products | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues	36,376	42,436
Products | Western Hemisphere | Operating Segments | Transferred at Point in Time
Segment Reporting Information [Line Items]
Revenues	23,767	35,952
Products | Western Hemisphere | Operating Segments | Transferred over Time
Segment Reporting Information [Line Items]
Revenues	12,609	6,484
Products | Eastern Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues	18,618	19,865
Products | Eastern Hemisphere | Operating Segments | Transferred at Point in Time
Segment Reporting Information [Line Items]
Revenues	14,118	17,461
Products | Eastern Hemisphere | Operating Segments | Transferred over Time
Segment Reporting Information [Line Items]
Revenues	4,500	2,404
Products | Asia-Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues	10,440	8,744
Products | Asia-Pacific | Operating Segments | Transferred at Point in Time
Segment Reporting Information [Line Items]
Revenues	10,440	6,505
Products | Asia-Pacific | Operating Segments | Transferred over Time
Segment Reporting Information [Line Items]
Revenues		2,239
Technical Advisory | Operating Segments
Segment Reporting Information [Line Items]
Revenues	14,299	12,707
Technical Advisory | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues	7,022	6,241
Technical Advisory | Eastern Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues	4,082	5,101
Technical Advisory | Asia-Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues	3,195	1,365
Reconditioning | Operating Segments
Segment Reporting Information [Line Items]
Revenues	4,177	4,754
Reconditioning | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues	2,823	2,841
Reconditioning | Eastern Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues	923	872
Reconditioning | Asia-Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues	431	1,041
Total Services (excluding rental tools) | Operating Segments
Segment Reporting Information [Line Items]
Revenues	18,476	17,461
Total Services (excluding rental tools) | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues	9,845	9,082
Total Services (excluding rental tools) | Eastern Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues	5,005	5,973
Total Services (excluding rental tools) | Asia-Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues	3,626	2,406
Leasing | Operating Segments
Segment Reporting Information [Line Items]
Revenues	10,407	10,667
Leasing | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues	6,321	5,535
Leasing | Eastern Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues	2,647	4,205
Leasing | Asia-Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,439	927
Total Services (including rental tools) | Operating Segments
Segment Reporting Information [Line Items]
Revenues	28,883	28,128
Total Services (including rental tools) | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues	16,166	14,617
Total Services (including rental tools) | Eastern Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues	7,652	10,178
Total Services (including rental tools) | Asia-Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues	$ 5,065	$ 3,333