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Balance Type:	debit
Period Type:	duration

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives, including amortization expense attributable to right-of-use asset from finance lease.

No definition available.

Name:	io_DepreciationExpenseIncludingFinanceLeaseRightofuseAssetAmortization
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Value of input used to measure goodwill.

No definition available.

Name:	io_GoodwillMeasurementInput
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Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

Amount of write-down of multi-client data library recognized in the income statement.

No definition available.

Name:	io_MulticlientDataLibraryImpairmentCharges
Namespace Prefix:	io_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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Name:	us-gaap_GoodwillImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The charge against earnings resulting from the aggregate write down of tangible assets from their carrying value to their fair value.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 2
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
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