Geographic Areas - Schedule of Segment Reporting (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Revenues	$ 90,446	$ 103,808	$ 186,444	$ 198,125
Depreciation and amortization	7,940	8,495	16,813	16,851
Income (loss) before income taxes	(7,061)	4,800	(48,368)	1,083
Total long-lived assets	299,479		299,479		$ 326,076
Total assets	1,147,691		1,147,691		1,206,565
Transferred at Point in Time
Segment Reporting Information [Line Items]
Revenues	29,005	55,217	66,378	103,541
Transferred Over Time
Segment Reporting Information [Line Items]
Revenues	34,128	22,016	64,313	39,126
Intercompany
Segment Reporting Information [Line Items]
Revenues	6,419	3,761	12,320	8,737
Eliminations
Segment Reporting Information [Line Items]
Revenues	(6,419)	(3,761)	(12,320)	(8,737)
Total long-lived assets	(371,939)		(371,939)		(371,938)
Total assets	(607,215)		(607,215)		(526,142)
Western Hemisphere
Segment Reporting Information [Line Items]
Revenues	55,952	55,525	116,455	112,161
Western Hemisphere | Transferred at Point in Time
Segment Reporting Information [Line Items]
Revenues	14,873	26,874	37,837	50,640
Western Hemisphere | Transferred Over Time
Segment Reporting Information [Line Items]
Revenues	21,924	12,009	40,432	24,619
Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Depreciation and amortization	4,801	5,437	10,423	10,857
Income (loss) before income taxes	5,024	5,675	13,177	8,408
Total long-lived assets	366,922		366,922		379,776
Total assets	785,060		785,060		732,716
Western Hemisphere | Intercompany
Segment Reporting Information [Line Items]
Revenues	2,317	2,519	5,631	6,613
Eastern Hemisphere [Member]
Segment Reporting Information [Line Items]
Revenues	20,324	33,050	45,920	59,463
Eastern Hemisphere [Member] | Transferred at Point in Time
Segment Reporting Information [Line Items]
Revenues	6,839	17,826	15,801	31,944
Eastern Hemisphere [Member] | Transferred Over Time
Segment Reporting Information [Line Items]
Revenues	7,377	6,714	16,594	11,214
Eastern Hemisphere [Member] | Operating Segments
Segment Reporting Information [Line Items]
Depreciation and amortization	952	1,176	1,926	2,228
Income (loss) before income taxes	(2,349)	7,321	(30,670)	13,902
Total long-lived assets	235,400		235,400		246,854
Total assets	781,078		781,078		818,803
Eastern Hemisphere [Member] | Intercompany
Segment Reporting Information [Line Items]
Revenues	689	202	1,020	346
Asia Pacific
Segment Reporting Information [Line Items]
Revenues	20,589	18,994	36,389	35,238
Asia Pacific | Transferred at Point in Time
Segment Reporting Information [Line Items]
Revenues	7,293	10,517	12,740	20,957
Asia Pacific | Transferred Over Time
Segment Reporting Information [Line Items]
Revenues	4,827	3,293	7,287	3,293
Asia Pacific | Operating Segments
Segment Reporting Information [Line Items]
Depreciation and amortization	1,254	1,199	2,594	2,397
Income (loss) before income taxes	5,615	6,704	7,184	11,901
Total long-lived assets	69,096		69,096		71,384
Total assets	188,768		188,768		$ 181,188
Asia Pacific | Intercompany
Segment Reporting Information [Line Items]
Revenues	3,413	1,040	5,669	1,778
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Revenues	(6,419)	(3,761)	(12,320)	(8,737)
Depreciation and amortization	933	683	1,870	1,369
Income (loss) before income taxes	(15,351)	(14,900)	(38,059)	(33,128)
Corporate, Non-Segment | Eliminations
Segment Reporting Information [Line Items]
Revenues	(6,419)	(3,761)	(12,320)	(8,737)
Products | Operating Segments
Segment Reporting Information [Line Items]
Revenues	63,133	77,233	130,691	142,667
Products | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues	36,797	38,883	78,269	75,259
Products | Eastern Hemisphere [Member] | Operating Segments
Segment Reporting Information [Line Items]
Revenues	14,216	24,540	32,395	43,158
Products | Asia Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues	12,120	13,810	20,027	24,250
Technical Advisory | Operating Segments
Segment Reporting Information [Line Items]
Revenues	15,331	13,058	29,512	27,360
Technical Advisory | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues	10,456	6,929	17,852	13,953
Technical Advisory | Eastern Hemisphere [Member] | Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,937	4,044	5,433	8,126
Technical Advisory | Asia Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues	2,938	2,085	6,227	5,281
Reconditioning | Operating Segments
Segment Reporting Information [Line Items]
Revenues	5,419	3,517	10,052	7,691
Reconditioning | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues	2,708	2,232	6,268	5,053
Reconditioning | Eastern Hemisphere [Member] | Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,656	825	2,498	1,747
Reconditioning | Asia Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,055	460	1,286	891
Total Services (excluding rental tools) | Operating Segments
Segment Reporting Information [Line Items]
Revenues	20,750	16,575	39,564	35,051
Total Services (excluding rental tools) | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues	13,164	9,161	24,120	19,006
Total Services (excluding rental tools) | Eastern Hemisphere [Member] | Operating Segments
Segment Reporting Information [Line Items]
Revenues	3,593	4,869	7,931	9,873
Total Services (excluding rental tools) | Asia Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues	3,993	2,545	7,513	6,172
Leasing | Operating Segments
Segment Reporting Information [Line Items]
Revenues	6,563	10,000	16,189	20,407
Leasing | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues	3,674	4,962	8,435	11,283
Leasing | Eastern Hemisphere [Member] | Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,826	3,439	4,574	6,086
Leasing | Asia Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,063	1,599	3,180	3,038
Total Services (including rental tools) | Operating Segments
Segment Reporting Information [Line Items]
Revenues	27,313	26,575	55,753	55,458
Total Services (including rental tools) | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues	16,838	14,123	32,555	30,289
Total Services (including rental tools) | Eastern Hemisphere [Member] | Operating Segments
Segment Reporting Information [Line Items]
Revenues	5,419	8,308	12,505	15,959
Total Services (including rental tools) | Asia Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues	$ 5,056	$ 4,144	$ 10,693	$ 9,210