Details of Selected Balance Sheet Accounts (Tables)

6 Months Ended

Jun. 30, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of inventories

A summary of inventories follows (in thousands):	June 30, 2020		December 31, 2019
Raw materials and subassemblies	$	18,128	$	18,509
Work-in-process	2,068		2,079
Finished goods	4,568		4,932
Less: reserve for excess and obsolete inventories	(12,902)		(13,333)
Inventories, net	$	11,862	$	12,187

Summary of property, plant, equipment and seismic rental equipment

A summary of property, plant and equipment follows (in thousands):	June 30, 2020		December 31, 2019
Buildings	$	15,694	$	15,486
Machinery and equipment	133,923		133,048
Seismic rental equipment	1,671		1,669
Furniture and fixtures	3,155		3,347
Other (a)	29,989		31,142
Total	184,432		184,692
Less: accumulated depreciation	(135,959)		(134,951)
Less: impairment of long-lived assets	(36,553)		(36,553)
Property, plant and equipment, net	$	11,920	$	13,188

^(a) Consists primarily of cable-based ocean bottom acquisition technologies that were fully impaired.

Schedule of multi-client data library

The change in multi-client data library are as follows (in thousands):	June 30, 2020		December 31, 2019
Gross costs of multi-client data creation	$	1,013,181	$	1,007,762
Less: accumulated amortization	(829,102)		(816,401)
Less: impairments to multi-client data library	(132,144)		(130,977)
Multi-client data library, net	$	51,935	$	60,384

Schedule of goodwill

	E&P Technology & Services		Optimization Software & Services		Total
Balance at January 1, 2019	$	2,943	$	19,972	$	22,915
Impact of foreign currency translation adjustments	—		670		670
Balance at December 31, 2019	2,943		20,642		23,585
Impairment of goodwill	—		(4,150)		(4,150)
Impact of foreign currency translation adjustments	—		(1,406)		(1,406)
Balance at June 30, 2020	$	2,943	$	15,086	$	18,029