Geographic Areas - Schedule of Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenues	$ 93,257	$ 100,346	$ 287,291	$ 347,498
Depreciation and amortization	8,724	9,518	25,966	32,231
Income (loss) before income taxes	(12,386)	(61,100)	(18,492)	(61,108)
Long-Lived Assets	395,309		395,309		$ 391,256
Total Assets	1,292,759		1,292,759		1,399,805
Products
Segment Reporting Information [Line Items]
Revenues	63,246	75,885	199,010	269,570
Total Services (including rental tools)
Segment Reporting Information [Line Items]
Revenues	30,011	24,461	88,281	77,928
Western Hemisphere
Segment Reporting Information [Line Items]
Revenues	62,457	70,319	187,279	234,929
Eastern Hemisphere
Segment Reporting Information [Line Items]
Revenues	26,615	25,024	80,395	74,806
Asia-Pacific
Segment Reporting Information [Line Items]
Revenues	8,624	18,255	32,437	61,550
Operating Segments | Products
Segment Reporting Information [Line Items]
Revenues	63,246	75,885	199,010	269,570
Operating Segments | Technical Advisory
Segment Reporting Information [Line Items]
Revenues	13,806	12,364	40,641	38,184
Operating Segments | Reconditioning
Segment Reporting Information [Line Items]
Revenues	3,735	2,871	12,362	7,581
Operating Segments | Total Services (excluding rental tools)
Segment Reporting Information [Line Items]
Revenues	17,541	15,235	53,003	45,765
Operating Segments | Leasing
Segment Reporting Information [Line Items]
Revenues	12,470	9,226	35,278	32,163
Operating Segments | Total Services (including rental tools)
Segment Reporting Information [Line Items]
Revenues	30,011	24,461	88,281	77,928
Operating Segments | Standard Products | Products
Segment Reporting Information [Line Items]
Revenues	48,606	60,530	158,661	218,873
Operating Segments | Percentage of Completion | Products
Segment Reporting Information [Line Items]
Revenues	14,640	15,355	40,349	50,697
Operating Segments | Western Hemisphere
Segment Reporting Information [Line Items]
Depreciation and amortization	5,607	6,827	17,091	24,153
Income (loss) before income taxes	13,902	(40,472)	12,999	(28,558)
Long-Lived Assets	466,703		466,703		482,636
Total Assets	800,936		800,936		877,779
Operating Segments | Western Hemisphere | Products
Segment Reporting Information [Line Items]
Revenues	43,825	43,344	130,259	162,931
Operating Segments | Western Hemisphere | Technical Advisory
Segment Reporting Information [Line Items]
Revenues	7,305	6,732	20,835	21,709
Operating Segments | Western Hemisphere | Reconditioning
Segment Reporting Information [Line Items]
Revenues	2,864	2,008	8,338	5,985
Operating Segments | Western Hemisphere | Total Services (excluding rental tools)
Segment Reporting Information [Line Items]
Revenues	10,169	8,740	29,173	27,694
Operating Segments | Western Hemisphere | Leasing
Segment Reporting Information [Line Items]
Revenues	5,899	5,666	18,162	21,604
Operating Segments | Western Hemisphere | Total Services (including rental tools)
Segment Reporting Information [Line Items]
Revenues	16,068	14,406	47,335	49,298
Operating Segments | Western Hemisphere | Standard Products | Products
Segment Reporting Information [Line Items]
Revenues	34,101	43,344	110,074	162,656
Operating Segments | Western Hemisphere | Percentage of Completion | Products
Segment Reporting Information [Line Items]
Revenues	9,724	0	20,185	275
Operating Segments | Eastern Hemisphere
Segment Reporting Information [Line Items]
Depreciation and amortization	1,057	1,073	3,402	3,228
Income (loss) before income taxes	8,133	(2,882)	13,792	3,401
Long-Lived Assets	256,779		256,779		264,828
Total Assets	777,868		777,868		752,967
Operating Segments | Eastern Hemisphere | Products
Segment Reporting Information [Line Items]
Revenues	17,834	17,200	52,238	53,567
Operating Segments | Eastern Hemisphere | Technical Advisory
Segment Reporting Information [Line Items]
Revenues	3,612	3,931	12,785	11,135
Operating Segments | Eastern Hemisphere | Reconditioning
Segment Reporting Information [Line Items]
Revenues	752	844	2,700	1,392
Operating Segments | Eastern Hemisphere | Total Services (excluding rental tools)
Segment Reporting Information [Line Items]
Revenues	4,364	4,775	15,485	12,527
Operating Segments | Eastern Hemisphere | Leasing
Segment Reporting Information [Line Items]
Revenues	3,115	2,782	10,837	8,158
Operating Segments | Eastern Hemisphere | Total Services (including rental tools)
Segment Reporting Information [Line Items]
Revenues	7,479	7,557	26,322	20,685
Operating Segments | Eastern Hemisphere | Standard Products | Products
Segment Reporting Information [Line Items]
Revenues	12,918	9,246	35,556	29,919
Operating Segments | Eastern Hemisphere | Percentage of Completion | Products
Segment Reporting Information [Line Items]
Revenues	4,916	7,954	16,682	23,648
Operating Segments | Asia-Pacific
Segment Reporting Information [Line Items]
Depreciation and amortization	1,390	1,015	3,521	3,046
Income (loss) before income taxes	(301)	(4,525)	(45)	3,115
Long-Lived Assets	66,466		66,466		58,606
Total Assets	161,662		161,662		185,229
Operating Segments | Asia-Pacific | Products
Segment Reporting Information [Line Items]
Revenues	1,587	15,341	16,513	53,072
Operating Segments | Asia-Pacific | Technical Advisory
Segment Reporting Information [Line Items]
Revenues	2,889	1,701	7,021	5,340
Operating Segments | Asia-Pacific | Reconditioning
Segment Reporting Information [Line Items]
Revenues	119	19	1,324	204
Operating Segments | Asia-Pacific | Total Services (excluding rental tools)
Segment Reporting Information [Line Items]
Revenues	3,008	1,720	8,345	5,544
Operating Segments | Asia-Pacific | Leasing
Segment Reporting Information [Line Items]
Revenues	3,456	778	6,279	2,401
Operating Segments | Asia-Pacific | Total Services (including rental tools)
Segment Reporting Information [Line Items]
Revenues	6,464	2,498	14,624	7,945
Operating Segments | Asia-Pacific | Standard Products | Products
Segment Reporting Information [Line Items]
Revenues	1,587	7,940	13,031	26,298
Operating Segments | Asia-Pacific | Percentage of Completion | Products
Segment Reporting Information [Line Items]
Revenues	0	7,401	3,482	26,774
Intercompany
Segment Reporting Information [Line Items]
Revenues	4,439	13,252	12,820	23,787
Intercompany | Western Hemisphere
Segment Reporting Information [Line Items]
Revenues	2,564	12,569	9,685	22,700
Intercompany | Eastern Hemisphere
Segment Reporting Information [Line Items]
Revenues	1,302	267	1,835	554
Intercompany | Asia-Pacific
Segment Reporting Information [Line Items]
Revenues	573	416	1,300	533
Eliminations
Segment Reporting Information [Line Items]
Revenues	(4,439)	(13,252)	(12,820)	(23,787)
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Depreciation and amortization	670	603	1,952	1,804
Income (loss) before income taxes	(34,120)	$ (13,221)	(45,238)	$ (39,066)
Long-Lived Assets	(394,640)		(394,640)		(414,814)
Total Assets	$ (447,707)		$ (447,707)		$ (416,170)