Debt Instrument, Qualified Cash Component, Maximum To Be Removed

No definition available.

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- Definition

Debt Instrument, Restrictive Covenants, Threshold For Liquidation, Value Of Multi-Client Data Library

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

Fixed charge coverage ratio.

+ References

No definition available.

+ Details

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- Definition

Line Of Credit Facility, Expected Borrowing Capacity Post Appraisal

+ References

No definition available.

+ Details

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Namespace Prefix:	io_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

+ Details

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- Definition

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.

+ Details

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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Balance Type:	credit
Period Type:	instant

- Details

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- Details

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- Details

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- Details

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Long-term Debt - Narrative (Details)	1 Months Ended
Long-term Debt - Narrative (Details)	Aug. 31, 2014 USD ($)	Aug. 04, 2015 USD ($)	Jun. 30, 2015 USD ($)	May. 31, 2013 USD ($)	May. 13, 2013 USD ($)
Senior Notes [Member]
Debt Instrument [Line Items]
Principal amount of debt				$ 175,000,000	$ 175,000,000
Stated rate on debt				8.125%	8.125%
Line of Credit [Member] \| PNC Bank, National Association (PNC) [Member]
Debt Instrument [Line Items]
Outstanding debt			$ 0
Line of Credit [Member] \| PNC Bank, National Association (PNC) [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Fixed charge coverage ratio	1.1
Line of Credit [Member] \| Revolving line of credit [Member] \| PNC Bank, National Association (PNC) [Member]
Debt Instrument [Line Items]
Current borrowing capacity	$ 80,000,000
Line of Credit [Member] \| Revolving line of credit [Member] \| PNC Bank, National Association (PNC) [Member] \| Subsequent event [Member]
Debt Instrument [Line Items]
Current borrowing capacity		$ 40,000,000
Limit for multi-client liquidation component		15,000,000.0
Qualified cash component, maximum to be removed		20,000,000.0
Line of Credit [Member] \| Revolving line of credit [Member] \| PNC Bank, National Association (PNC) [Member] \| Subsequent event [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Expecting borrowing capacity following appraisal		30,000,000
Line of Credit [Member] \| Revolving line of credit [Member] \| PNC Bank, National Association (PNC) [Member] \| Subsequent event [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Expecting borrowing capacity following appraisal		$ 40,000,000