Segment Information (Details) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019 USD ($) segment	Mar. 31, 2019 segment	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) segment	Jun. 30, 2018 USD ($)
Segment Reporting [Abstract]
Number of segments \| segment	2	3		2
Summary of segment information
Net revenues	$ 41,775		$ 24,743	$ 78,731	$ 58,251
Gross profit (loss)	$ 19,583		$ (1,517)	$ 29,495	$ 5,336
Gross margin	47.00%		(6.00%)	37.00%	9.00%
Income (loss) from operations	$ (2,553)		$ (22,519)	$ (18,490)	$ (35,159)
Interest expense, net	(3,111)		(2,911)	(6,223)	(6,747)
Other income (expense), net	96		84	(696)	(707)
Loss before income taxes	(5,568)		(25,346)	(25,409)	(42,613)
Operating expenses	22,136		21,002	47,985	40,495
Operating segments
Summary of segment information
Gross profit (loss)	$ 19,583		$ 77	$ 29,495	$ 8,731
Gross margin	47.00%		0.00%	37.00%	15.00%
Operating segments \| E&P Technology & Services
Summary of segment information
Net revenues	$ 28,523		$ 15,188	$ 55,626	$ 39,756
Gross profit (loss)	$ 12,357		$ (4,856)	$ 17,797	$ (513)
Gross margin	43.00%		(32.00%)	32.00%	(1.00%)
Income (loss) from operations	$ 5,237		$ (10,206)	$ 3,622	$ (11,000)
Operating segments \| E&P Technology & Services \| Total multi-client revenues
Summary of segment information
Net revenues	22,812		9,850	46,231	29,524
Operating segments \| E&P Technology & Services \| New Venture
Summary of segment information
Net revenues	5,018		8,125	18,489	21,851
Operating segments \| E&P Technology & Services \| Data Library
Summary of segment information
Net revenues	17,794		1,725	27,742	7,673
Operating segments \| E&P Technology & Services \| Imaging Services
Summary of segment information
Net revenues	5,711		5,338	9,395	10,232
Operating segments \| E&P Operations Optimization
Summary of segment information
Net revenues	13,252		9,555	23,105	18,495
Gross profit (loss)	$ 7,226		$ 4,933	$ 11,698	$ 9,244
Gross margin	55.00%		52.00%	51.00%	50.00%
Income (loss) from operations	$ 2,644		$ 1,243	$ 2,814	$ 2,029
Operating segments \| E&P Operations Optimization \| Devices
Summary of segment information
Net revenues	7,532		4,761	12,352	8,919
Operating segments \| E&P Operations Optimization \| Optimization Software & Services
Summary of segment information
Net revenues	5,720		4,794	10,753	9,576
Other
Summary of segment information
Gross profit (loss)	$ 0		$ (1,594)	$ 0	$ (3,395)
Gross margin	0.00%		(6.00%)	0.00%	(6.00%)
Support and other
Summary of segment information
Income (loss) from operations	$ (10,434)		$ (13,556)	$ (24,926)	$ (26,188)
Previously reported segment
Summary of segment information
Income (loss) from operations	700		2,900	1,600	5,800
Operating expenses	$ 700		$ 1,300	$ 1,600	$ 2,400

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