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Major Clients | 12 Months Ended
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Dec. 31, 2017
Major Clients |
Major Clients | 14. Major Clients The Company operates in only one business segment, contract seismic data acquisition and processing services. Sales to these clients, as a percentage of operating revenues that exceeded 10%, were as follows:
| Year Ended December 31, |
|  | 2017 |  |  | 2016 |  |  | 2015 |
A |  | 17% |  |  | 13% |  |  | 21% |
B |  | 10% |  |  | — |  |  | 15% |
The Company does not believe that the loss of any client listed above would have a material adverse effect on the Company.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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