Revenue Recognition (Tables)

6 Months Ended

Jun. 30, 2014

Revenue Recognition [Abstract]

Revenue Recognized From Non-Monetary Exchanges

Due to the Company’s revenue recognition policies, revenue recognized on non-monetary exchange transactions may not occur at the same time the seismic data acquired is recorded as an asset. The activity related to non-monetary exchanges was as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
Seismic data library additions	$	—	$	261	$	177	$	2,977
Revenue recognized on specific data licenses or selections of data	61		104		238		682
Revenue recognized related to acquisition contracts	—		27		—		84