Details of Selected Balance Sheet Accounts - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property, plant, equipment and seismic rental equipment	$ 184,168		$ 184,692
Less: accumulated depreciation	(134,909)		(134,951)
Less: impairment of long-lived assets	(36,553)		(36,553)
Property, plant and equipment, net	12,706		13,188
Depreciation expense including amortization under finance leases	800	$ 800
Buildings
Property, Plant and Equipment [Line Items]
Property, plant, equipment and seismic rental equipment	15,665		15,486
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant, equipment and seismic rental equipment	133,722		133,048
Seismic rental equipment
Property, Plant and Equipment [Line Items]
Property, plant, equipment and seismic rental equipment	1,668		1,669
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant, equipment and seismic rental equipment	3,158		3,347
Other
Property, Plant and Equipment [Line Items]
Property, plant, equipment and seismic rental equipment	$ 29,955		$ 31,142

Accumulated Impairment, Property, Plant, and Equipment

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- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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