Geographic Areas - Schedule of Segment Reporting (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Revenues	$ 91,295	$ 108,227	$ 277,739	$ 306,353
Depreciation and amortization	7,908	8,304	24,721	25,155
Income (loss) before income taxes	(2,054)	2,102	(50,422)	3,185
Total long-lived assets	296,537		296,537		$ 326,076
Total assets	1,159,539		1,159,539		1,206,565
Transferred at Point in Time
Segment Reporting Information [Line Items]
Revenues	32,746	59,539	99,124	163,424
Transferred Over Time
Segment Reporting Information [Line Items]
Revenues	33,705	22,312	98,018	61,094
Intercompany
Segment Reporting Information [Line Items]
Revenues	8,395	5,102	20,715	13,840
Eliminations
Segment Reporting Information [Line Items]
Revenues	(8,395)	(5,102)	(20,715)	(13,840)
Total long-lived assets	(371,938)		(371,938)		(371,938)
Total assets	(591,965)		(591,965)		(526,142)
Western Hemisphere
Segment Reporting Information [Line Items]
Revenues	55,513	60,847	171,968	173,010
Western Hemisphere | Transferred at Point in Time
Segment Reporting Information [Line Items]
Revenues	16,937	30,135	54,774	81,120
Western Hemisphere | Transferred Over Time
Segment Reporting Information [Line Items]
Revenues	19,158	12,425	59,590	36,700
Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Depreciation and amortization	4,831	5,327	15,254	16,183
Income (loss) before income taxes	3,339	3,882	16,516	12,291
Total long-lived assets	364,056		364,056		379,776
Total assets	776,385		776,385		732,716
Western Hemisphere | Intercompany
Segment Reporting Information [Line Items]
Revenues	3,060	2,572	8,691	9,185
Eastern Hemisphere [Member]
Segment Reporting Information [Line Items]
Revenues	20,042	31,102	65,962	90,565
Eastern Hemisphere [Member] | Transferred at Point in Time
Segment Reporting Information [Line Items]
Revenues	8,033	18,514	23,834	50,458
Eastern Hemisphere [Member] | Transferred Over Time
Segment Reporting Information [Line Items]
Revenues	5,344	5,143	21,938	16,357
Eastern Hemisphere [Member] | Operating Segments
Segment Reporting Information [Line Items]
Depreciation and amortization	882	970	2,808	3,198
Income (loss) before income taxes	3,255	11,627	(27,415)	25,529
Total long-lived assets	235,521		235,521		246,854
Total assets	785,576		785,576		818,803
Eastern Hemisphere [Member] | Intercompany
Segment Reporting Information [Line Items]
Revenues	1,006	72	2,026	418
Asia Pacific
Segment Reporting Information [Line Items]
Revenues	24,135	21,380	60,524	56,618
Asia Pacific | Transferred at Point in Time
Segment Reporting Information [Line Items]
Revenues	7,776	10,890	20,516	31,846
Asia Pacific | Transferred Over Time
Segment Reporting Information [Line Items]
Revenues	9,203	4,744	16,490	8,037
Asia Pacific | Operating Segments
Segment Reporting Information [Line Items]
Depreciation and amortization	1,265	1,240	3,859	3,637
Income (loss) before income taxes	5,396	6,051	12,580	17,951
Total long-lived assets	68,898		68,898		71,384
Total assets	189,543		189,543		$ 181,188
Asia Pacific | Intercompany
Segment Reporting Information [Line Items]
Revenues	4,329	2,458	9,998	4,237
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Revenues	(8,395)	(5,102)	(20,715)	(13,840)
Depreciation and amortization	930	767	2,800	2,137
Income (loss) before income taxes	(14,044)	(19,458)	(52,103)	(52,586)
Corporate, Non-Segment | Eliminations
Segment Reporting Information [Line Items]
Revenues	(8,395)	(5,102)	(20,715)	(13,840)
Products | Operating Segments
Segment Reporting Information [Line Items]
Revenues	66,451	81,851	197,142	224,518
Products | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues	36,095	42,560	114,364	117,820
Products | Eastern Hemisphere [Member] | Operating Segments
Segment Reporting Information [Line Items]
Revenues	13,377	23,657	45,772	66,815
Products | Asia Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues	16,979	15,634	37,006	39,883
Technical Advisory | Operating Segments
Segment Reporting Information [Line Items]
Revenues	13,004	13,516	42,516	40,877
Technical Advisory | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues	8,317	8,165	26,169	22,118
Technical Advisory | Eastern Hemisphere [Member] | Operating Segments
Segment Reporting Information [Line Items]
Revenues	2,285	3,301	7,718	11,428
Technical Advisory | Asia Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues	2,402	2,050	8,629	7,331
Reconditioning | Operating Segments
Segment Reporting Information [Line Items]
Revenues	4,774	4,368	14,826	12,059
Reconditioning | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues	2,657	2,892	8,925	7,945
Reconditioning | Eastern Hemisphere [Member] | Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,404	1,353	3,902	3,100
Reconditioning | Asia Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues	713	123	1,999	1,014
Total Services (excluding rental tools) | Operating Segments
Segment Reporting Information [Line Items]
Revenues	17,778	17,884	57,342	52,936
Total Services (excluding rental tools) | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues	10,974	11,057	35,094	30,063
Total Services (excluding rental tools) | Eastern Hemisphere [Member] | Operating Segments
Segment Reporting Information [Line Items]
Revenues	3,689	4,654	11,620	14,528
Total Services (excluding rental tools) | Asia Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues	3,115	2,173	10,628	8,345
Leasing | Operating Segments
Segment Reporting Information [Line Items]
Revenues	7,066	8,492	23,255	28,899
Leasing | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues	5,384	4,658	13,819	15,942
Leasing | Eastern Hemisphere [Member] | Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,970	2,719	6,544	8,804
Leasing | Asia Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues	(288)	1,115	2,892	4,153
Total Services (including rental tools) | Operating Segments
Segment Reporting Information [Line Items]
Revenues	24,844	26,376	80,597	81,835
Total Services (including rental tools) | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues	16,358	15,715	48,913	46,005
Total Services (including rental tools) | Eastern Hemisphere [Member] | Operating Segments
Segment Reporting Information [Line Items]
Revenues	5,659	7,373	18,164	23,332
Total Services (including rental tools) | Asia Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues	$ 2,827	$ 3,288	$ 13,520	$ 12,498