Geographic Areas - Schedule of Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenues	$ 94,861	$ 127,922	$ 194,034	$ 247,150
Depreciation and amortization	9,001	12,881	17,242	22,713
Income (loss) before income taxes	(1,624)	(62)	(6,103)	(10)
Long-Lived Assets	385,269		385,269		$ 391,256
Total Assets	1,361,691		1,361,691		1,399,805
Products
Segment Reporting Information [Line Items]
Revenues	64,719	102,092	135,764	193,684
Total Services (including rental tools)
Segment Reporting Information [Line Items]
Revenues	30,142	25,830	58,270	53,466
Western Hemisphere
Segment Reporting Information [Line Items]
Revenues	64,698	74,955	124,822	164,608
Eastern Hemisphere
Segment Reporting Information [Line Items]
Revenues	23,550	29,550	53,780	49,782
Asia-Pacific
Segment Reporting Information [Line Items]
Revenues	11,571	27,951	23,813	43,294
Operating Segments | Products
Segment Reporting Information [Line Items]
Revenues	64,719	102,092	135,764	193,684
Operating Segments | Technical Advisory
Segment Reporting Information [Line Items]
Revenues	14,126	13,590	26,833	25,820
Operating Segments | Reconditioning
Segment Reporting Information [Line Items]
Revenues	3,870	2,405	8,625	4,709
Operating Segments | Total Services (excluding rental tools)
Segment Reporting Information [Line Items]
Revenues	17,996	15,995	35,458	30,529
Operating Segments | Leasing
Segment Reporting Information [Line Items]
Revenues	12,146	9,835	22,812	22,937
Operating Segments | Total Services (including rental tools)
Segment Reporting Information [Line Items]
Revenues	30,142	25,830	58,270	53,466
Operating Segments | Standard Products | Products
Segment Reporting Information [Line Items]
Revenues	52,531	81,344	111,199	158,343
Operating Segments | Percentage of Completion | Products
Segment Reporting Information [Line Items]
Revenues	12,188	20,748	24,565	35,341
Operating Segments | Western Hemisphere
Segment Reporting Information [Line Items]
Depreciation and amortization	5,993	10,190	11,484	17,327
Income (loss) before income taxes	6,362	4,442	7,086	11,914
Long-Lived Assets	470,169		470,169		482,636
Total Assets	835,296		835,296		877,779
Operating Segments | Western Hemisphere | Products
Segment Reporting Information [Line Items]
Revenues	43,999	54,299	86,434	119,587
Operating Segments | Western Hemisphere | Technical Advisory
Segment Reporting Information [Line Items]
Revenues	7,286	7,658	13,527	14,978
Operating Segments | Western Hemisphere | Reconditioning
Segment Reporting Information [Line Items]
Revenues	2,631	2,058	5,473	3,977
Operating Segments | Western Hemisphere | Total Services (excluding rental tools)
Segment Reporting Information [Line Items]
Revenues	9,917	9,716	19,000	18,955
Operating Segments | Western Hemisphere | Leasing
Segment Reporting Information [Line Items]
Revenues	6,734	6,713	12,267	15,936
Operating Segments | Western Hemisphere | Total Services (including rental tools)
Segment Reporting Information [Line Items]
Revenues	16,651	16,429	31,267	34,891
Operating Segments | Western Hemisphere | Standard Products | Products
Segment Reporting Information [Line Items]
Revenues	40,022	54,299	77,117	119,312
Operating Segments | Western Hemisphere | Percentage of Completion | Products
Segment Reporting Information [Line Items]
Revenues	3,977	0	9,317	275
Operating Segments | Eastern Hemisphere
Segment Reporting Information [Line Items]
Depreciation and amortization	1,134	1,075	2,346	2,155
Income (loss) before income taxes	8,133	2,792	13,792	6,283
Long-Lived Assets	273,489		273,489		264,828
Total Assets	766,741		766,741		752,967
Operating Segments | Eastern Hemisphere | Products
Segment Reporting Information [Line Items]
Revenues	14,539	22,441	34,404	36,367
Operating Segments | Eastern Hemisphere | Technical Advisory
Segment Reporting Information [Line Items]
Revenues	4,072	4,270	9,174	7,203
Operating Segments | Eastern Hemisphere | Reconditioning
Segment Reporting Information [Line Items]
Revenues	1,076	207	1,948	548
Operating Segments | Eastern Hemisphere | Total Services (excluding rental tools)
Segment Reporting Information [Line Items]
Revenues	5,148	4,477	11,122	7,751
Operating Segments | Eastern Hemisphere | Leasing
Segment Reporting Information [Line Items]
Revenues	3,516	2,376	7,722	5,377
Operating Segments | Eastern Hemisphere | Total Services (including rental tools)
Segment Reporting Information [Line Items]
Revenues	8,664	6,853	18,844	13,128
Operating Segments | Eastern Hemisphere | Standard Products | Products
Segment Reporting Information [Line Items]
Revenues	7,571	13,633	22,638	20,673
Operating Segments | Eastern Hemisphere | Percentage of Completion | Products
Segment Reporting Information [Line Items]
Revenues	6,968	8,808	11,766	15,694
Operating Segments | Asia-Pacific
Segment Reporting Information [Line Items]
Depreciation and amortization	1,155	1,014	2,130	2,031
Income (loss) before income taxes	(301)	5,796	(45)	7,640
Long-Lived Assets	67,489		67,489		58,606
Total Assets	188,777		188,777		185,229
Operating Segments | Asia-Pacific | Products
Segment Reporting Information [Line Items]
Revenues	6,181	25,352	14,926	37,730
Operating Segments | Asia-Pacific | Technical Advisory
Segment Reporting Information [Line Items]
Revenues	2,768	1,662	4,132	3,639
Operating Segments | Asia-Pacific | Reconditioning
Segment Reporting Information [Line Items]
Revenues	163	140	1,204	184
Operating Segments | Asia-Pacific | Total Services (excluding rental tools)
Segment Reporting Information [Line Items]
Revenues	2,931	1,802	5,336	3,823
Operating Segments | Asia-Pacific | Leasing
Segment Reporting Information [Line Items]
Revenues	1,896	746	2,823	1,624
Operating Segments | Asia-Pacific | Total Services (including rental tools)
Segment Reporting Information [Line Items]
Revenues	4,827	2,548	8,159	5,447
Operating Segments | Asia-Pacific | Standard Products | Products
Segment Reporting Information [Line Items]
Revenues	4,938	13,412	11,444	18,358
Operating Segments | Asia-Pacific | Percentage of Completion | Products
Segment Reporting Information [Line Items]
Revenues	1,243	11,940	3,482	19,372
Intercompany
Segment Reporting Information [Line Items]
Revenues	4,958	4,534	8,381	10,534
Intercompany | Western Hemisphere
Segment Reporting Information [Line Items]
Revenues	4,048	4,227	7,121	10,130
Intercompany | Eastern Hemisphere
Segment Reporting Information [Line Items]
Revenues	347	256	532	287
Intercompany | Asia-Pacific
Segment Reporting Information [Line Items]
Revenues	563	51	728	117
Eliminations
Segment Reporting Information [Line Items]
Revenues	(4,958)	(4,534)	(8,381)	(10,534)
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Depreciation and amortization	719	602	1,282	1,200
Income (loss) before income taxes	(15,818)	$ (13,092)	(26,936)	$ (25,847)
Long-Lived Assets	(425,878)		(425,878)		(414,814)
Total Assets	$ (429,123)		$ (429,123)		$ (416,170)