Revenue From Contracts With Customers (Tables)

3 Months Ended

Mar. 31, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following table is a summary of net revenues by geographic area (in thousands):

	Three Months Ended March 31,
	2018		2017
Net revenues by geographic area:
Latin America	$	9,852	$	6,585
North America	8,048		7,395
Europe	5,549		5,636
Africa	5,019		560
Asia Pacific	3,934		4,823
Middle East	749		580
CIS	357		6,977
Total	$	33,508	$	32,556

Unbilled Revenue

Unbilled receivables relate to revenues recognized on multi-client surveys, imaging services and Devices equipment repairs on a proportionate basis, and on licensing of multi-client data libraries for which invoices have not yet been presented to the customer. The following table is a summary of unbilled receivables (in thousands):

	March 31, 2018		December 31, 2017
New Venture	$	10,734	$	33,183
Imaging Services	5,412		4,121
Devices	203		—
Total	$	16,349	$	37,304

The changes in unbilled receivables were as follows (in thousands):

Unbilled Receivables at December 31, 2017	$	37,304
Recognition of unbilled receivables	25,843
Revenues billed to customers	(46,798		)
Unbilled Receivables at March 31, 2018	$	16,349

Deferred Revenue

The following table is a summary of deferred revenues (in thousands):

	March 31, 2018		December 31, 2017
New Venture	$	9,611	$	6,548
Imaging Services	453		676
Devices	360		633
Optimization Software & Services	906		1,053
Total	$	11,330	$	8,910

The changes in deferred revenues were as follows (in thousands):

Deferred revenue at December 31, 2017	$	8,910
Cash collected in excess of revenue recognized	10,083
Recognition of deferred revenue (a)	(7,663		)
Deferred revenue at March 31, 2018	$	11,330

^(a)  The majority of deferred revenue recognized relates to Company’s new venture and imaging services groups.