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Basis of Presentation and Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
The activity related to non-monetary exchanges
The activity related to non-monetary exchanges was as follows (in thousands): 
 
 
Year Ended December 31,
 
 
2017
 
2016
 
2015
Seismic data library additions
 
$
2,064

 
$
2,640

 
$
9,311

Revenue recognized on specific data licenses or selections of data
 
1,250

 
3,179

 
6,747

Revenue recognized related to acquisition contracts
 
279

 
129

 
168

Revenue recognized related to Solutions and other revenue
 
91

 
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