DETAIL OF SELECTED BALANCE SHEET ACCOUNTS - Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 104,203	$ 123,186
Less: accumulated depreciation and amortization	(61,444)	(61,358)
Property and equipment, net	42,759	61,828
Depreciation and amortization expense	16,815	18,622
Depreciation and amortization included in cost of services	16,410	18,137
Depreciation and amortization recorded in selling, general and administrative expense	405	485
Proceeds from sale of property and equipment	488	166
Loss on disposal of property and equipment, net	4,542	632
Field operating equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	80,780	100,001
Proceeds from sale of property and equipment	1,850
Loss on disposal of property and equipment, net	4,580
Vehicles
Property, Plant and Equipment [Line Items]
Property and equipment, gross	15,905	16,041
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	511	481
Software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,081	1,906
Computer equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	4,005	3,856
Office equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 921	$ 901
Minimum \| Field operating equipment
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment (in years)	3 years
Minimum \| Vehicles
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment (in years)	3 years
Minimum \| Leasehold improvements
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment (in years)	2 years
Minimum \| Software
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment (in years)	3 years
Minimum \| Computer equipment
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment (in years)	3 years
Minimum \| Office equipment
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment (in years)	3 years
Maximum \| Field operating equipment
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment (in years)	10 years
Maximum \| Vehicles
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment (in years)	5 years
Maximum \| Leasehold improvements
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment (in years)	5 years
Maximum \| Software
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment (in years)	5 years
Maximum \| Computer equipment
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment (in years)	5 years
Maximum \| Office equipment
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment (in years)	10 years

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.14)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Depreciation of property, plant and equipment directly related to services rendered by an entity during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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.

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Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

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- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

+ 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.

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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.

+ References

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

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