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Statement Of Cash Flow Information (Tables)
6 Months Ended
Jun. 30, 2014
Supplemental Cash Flow Elements [Abstract]  
Schedule of Noncash Additions to Seismic Data Library
The Company had non-cash additions to its seismic data library comprised of the following (in thousands): 
 
Six Months Ended
June 30,
 
2014
 
2013
Non-monetary exchanges related to resale licensing revenue
$
177

 
$
585

Completion of data in progress from prior non-monetary exchanges

 
2,392

Total non-cash additions to seismic data library
$
177

 
$
2,977

Schedule of Non-Cash Revenue
Non-cash revenue consisted of the following (in thousands):
 
Six Months Ended
June 30,
 
2014
 
2013
Acquisition revenue on underwriting from non-monetary exchange contracts
$

 
$
84

Licensing revenue from specific data licenses and selections on non-monetary exchange contracts
238

 
682

Total non-cash revenue
$
238

 
$
766