Statement of Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2017

Supplemental Cash Flow Elements [Abstract]

Schedule of Non-cash Additions

The Company had non-cash additions to its seismic data library comprised of the following (in thousands):

	Year Ended December 31,
	2017			2016		2015
Non-monetary exchanges related to resale licensing	$	2,075		$	1,840	$	9,300
Non-monetary exchanges from underwriting of new data acquisition	—			408		—
Adjustment to prior year non-monetary exchanges	(11		)	—		(2		)
Non-monetary exchanges related to data processing and reproduction services	—			392		13
Total non-cash additions to seismic data library	$	2,064		$	2,640	$	9,311

Schedule of Non-Cash Revenue

Non-cash revenue consisted of the following (in thousands):

	Year Ended December 31,
	2017		2016		2015
Acquisition revenue on underwriting from non-monetary exchange contracts	$	279	$	129	$	168
Licensing revenue from specific data licenses and selections on non-monetary exchange contracts	1,250		3,179		6,747
Solutions and other revenue recognized from non-monetary exchange contracts	91		—		13
Total non-cash revenue	$	1,620	$	3,308	$	6,928