Segment Information (Details) $ in Thousands	3 Months Ended
Mar. 31, 2018 USD ($) segment	Mar. 31, 2017 USD ($)
Segment Reporting [Abstract]
Number of segments \| segment	3
Summary of segment information
Net revenues	$ 33,508	$ 32,556
Gross profit (loss)	$ 6,853	$ 6,101
Gross margin	20.00%	19.00%
Income (loss) from operations	$ (12,640)	$ (13,912)
Interest expense, net	(3,836)	(4,464)
Other expense, net	(791)	(5,068)
Loss before income taxes	(17,267)	(23,444)
E&P Technology & Services
Summary of segment information
Net revenues	24,568	23,310
Gross profit (loss)	$ 4,343	$ 4,010
Gross margin	18.00%	17.00%
E&P Technology & Services \| New Venture and Data Library [Member]
Summary of segment information
Net revenues	$ 19,674	$ 17,555
E&P Technology & Services \| New Venture
Summary of segment information
Net revenues	13,726	6,949
E&P Technology & Services \| Data Library
Summary of segment information
Net revenues	5,948	10,606
E&P Technology & Services \| Imaging Services
Summary of segment information
Net revenues	4,894	5,755
Operations Optimization
Summary of segment information
Net revenues	8,940	9,246
Gross profit (loss)	$ 4,311	$ 4,787
Gross margin	48.00%	52.00%
Operations Optimization \| Devices
Summary of segment information
Net revenues	$ 4,158	$ 4,990
Operations Optimization \| Optimization Software & Services
Summary of segment information
Net revenues	4,782	4,256
Ocean Bottom Integrated Technologies
Summary of segment information
Net revenues	0	0
Gross profit (loss)	$ (1,801)	$ (2,696)
Gross margin	0.00%	0.00%
Operating segments \| E&P Technology & Services
Summary of segment information
Income (loss) from operations	$ (794)	$ (1,096)
Operating segments \| Operations Optimization
Summary of segment information
Income (loss) from operations	786	1,549
Operating segments \| Ocean Bottom Integrated Technologies
Summary of segment information
Income (loss) from operations	(2,829)	(4,008)
Support and other
Summary of segment information
Income (loss) from operations	$ (9,803)	$ (10,357)

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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