10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 10-Q

ý QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

FOR THE QUARTERLY PERIOD ENDED MARCH 31, 2014

OR

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

COMMISSION FILE NUMBER: 1-12691

ION GEOPHYSICAL CORPORATION

(EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

DELAWARE	22-2286646
(State or other jurisdiction of	(I.R.S. Employer
incorporation or organization)	Identification No.)

2105 CityWest Blvd.
Suite 400
Houston, Texas	77042-2839
(Address of principal executive offices)	(Zip Code)

REGISTRANT’S TELEPHONE NUMBER, INCLUDING AREA CODE: (281) 933-3339

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ýNo  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  ýNo  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer	ý	Accelerated filer	o
Non-accelerated filer	o  (Do not check if a smaller reporting company)	Smaller reporting company	o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes ¨No  ý

At April 21, 2014, there were 164,054,309 shares of common stock, par value $0.01 per share, outstanding.

1

ION GEOPHYSICAL CORPORATION AND SUBSIDIARIES

TABLE OF CONTENTS FOR FORM 10-Q

FOR THE QUARTER ENDED MARCH 31, 2014

	PAGE
PART I. Financial Information
Item 1. Financial Statements	3
Condensed Consolidated Balance Sheets as of March 31, 2014 and December 31, 2013	3
Condensed Consolidated Statements of Operations for the three-months ended March 31, 2014 and 2013	4
Condensed Consolidated Statements of Comprehensive Income (Loss) for the three-months ended March 31, 2014 and 2013	5
Condensed Consolidated Statements of Cash Flows for the three-months ended March 31, 2014 and 2013	6
Notes to Unaudited Condensed Consolidated Financial Statements	7
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	22
Item 3. Quantitative and Qualitative Disclosures about Market Risk	30
Item 4. Controls and Procedures	30
PART II. Other Information
Item 1. Legal Proceedings	32
Item 1A. Risk Factors	33
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	35
Item 5. Other Information	35
Item 6. Exhibits	36

2

PART I. FINANCIAL INFORMATION

Item 1.Financial Statements

ION GEOPHYSICAL CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(UNAUDITED)

	March 31, 2014			December 31, 2013
	( In thousands, except share data)
ASSETS
Current assets:
Cash and cash equivalents	$	197,306		$	148,056
Accounts receivable, net	98,231			149,448
Unbilled receivables	68,452			49,468
Inventories	54,709			57,173
Prepaid expenses and other current assets	25,605			24,772
Total current assets	444,303			428,917
Deferred income tax asset	14,339			14,650
Property, plant, equipment and seismic rental equipment, net	59,811			46,684
Multi-client data library, net	243,083			238,784
Equity method investments	47,466			53,865
Goodwill	56,111			55,876
Intangible assets, net	10,566			11,247
Other assets	15,640			14,648
Total assets	$	891,319		$	864,671
LIABILITIES AND EQUITY
Current liabilities:
Current maturities of long-term debt	$	60,551		$	5,906
Accounts payable	38,654			22,654
Accrued expenses	72,471			84,358
Accrued multi-client data library royalties	38,263			46,460
Deferred revenue	16,030			20,682
Total current liabilities	225,969			180,060
Long-term debt, net of current maturities	180,462			214,246
Other long-term liabilities	142,987			210,602
Total liabilities	549,418			604,908
Redeemable noncontrolling interests	5,552			1,878
Equity:
Common stock, $0.01 par value; authorized 200,000,000 shares; outstanding 164,049,309 and 163,737,757 shares at March 31, 2014 and December 31, 2013, respectively, net of treasury stock	1,640			1,637
Additional paid-in capital	882,892			879,969
Accumulated deficit	(530,178		)	(606,157		)
Accumulated other comprehensive loss	(11,799		)	(11,138		)
Treasury stock, at cost, 849,539 shares at both March 31, 2014 and December 31, 2013	(6,565		)	(6,565		)
Total stockholders’ equity	335,990			257,746
Noncontrolling interests	359			139
Total equity	336,349			257,885
Total liabilities and equity	$	891,319		$	864,671

See accompanying Notes to Unaudited Condensed Consolidated Financial Statements.

3

ION GEOPHYSICAL CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(UNAUDITED)

	Three Months Ended March 31,
	2014			2013
	(In thousands, except per share data)
Service revenues	$	110,696		$	89,949
Product revenues	34,002			39,788
Total net revenues	144,698			129,737
Cost of services	72,071			69,273
Cost of products	15,773			25,507
Gross profit	56,854			34,957
Operating expenses:
Research, development and engineering	9,039			9,290
Marketing and sales	9,213			7,980
General, administrative and other operating expenses	18,931			15,764
Total operating expenses	37,183			33,034
Income from operations	19,671			1,923
Interest expense, net	(4,797		)	(1,066		)
Equity in earnings (losses) of investments	(1,688		)	1,116
Other income, net	68,526			1,027
Income before income taxes	81,712			3,000
Income tax expense	5,263			1,201
Net income	76,449			1,799
Net (income) loss attributable to noncontrolling interests	(470		)	76
Net income attributable to ION	75,979			1,875
Preferred stock dividends	—			338
Net income applicable to common shares	$	75,979		$	1,537
Net income per share:
Basic	$	0.46		$	0.01
Diluted	$	0.46		$	0.01
Weighted average number of common shares outstanding:
Basic	163,847			156,465
Diluted	164,061			157,315

See accompanying Notes to Unaudited Condensed Consolidated Financial Statements.

4

ION GEOPHYSICAL CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

(UNAUDITED)

	Three Months Ended March 31,
	2014			2013
	(In thousands)
Net income	$	76,449		$	1,799
Other comprehensive loss, net of taxes, as appropriate:
Foreign currency translation adjustments	486			(3,641		)
Equity interest in investees' other comprehensive loss	(1,173		)	(23		)
Other changes in other comprehensive income	26			8
Total other comprehensive loss, net of taxes	(661		)	(3,656		)
Comprehensive net income (loss)	75,788			(1,857		)
Comprehensive (income) loss attributable to noncontrolling interest	(470		)	76
Comprehensive net income (loss) attributable to ION	$	75,318		$	(1,781	)

See accompanying Notes to Unaudited Condensed Consolidated Financial Statements.

5

ION GEOPHYSICAL CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(UNAUDITED)

	Three Months Ended March 31,
	2014			2013
	(In thousands)
Cash flows from operating activities:
Net income	$	76,449		$	1,799
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization (other than multi-client data library)	7,904			4,200
Amortization of multi-client data library	16,326			18,592
Stock-based compensation expense	2,777			2,011
Equity in (earnings) losses of investments	1,688			(1,116		)
Reduction of accrual for loss contingency related to legal proceedings	(69,557		)	—
Deferred income taxes	(884		)	(6,150		)
Change in operating assets and liabilities:
Accounts receivable	60,646			35,307
Unbilled receivables	(18,945		)	11,938
Inventories	(144		)	1,381
Accounts payable, accrued expenses and accrued royalties	(5,359		)	(13,373		)
Deferred revenue	(4,678		)	(7,153		)
Other assets and liabilities	(3,541		)	2,155
Net cash provided by operating activities	62,682			49,591
Cash flows from investing activities:
Cash invested in multi-client data library	(22,353		)	(28,778		)
Purchase of property, plant, equipment and seismic rental assets	(1,997		)	(3,774		)
Repayment of advances by INOVA Geophysical	1,000			—
Investment in and advances to OceanGeo B.V.	(3,683		)	(9,500		)
Cash of OceanGeo B.V. upon acquiring a controlling interest	609			—
Investment in convertible note	—			(1,000		)
Other investing activities	605			76
Net cash used in investing activities	(25,819		)	(42,976		)
Cash flows from financing activities:
Borrowings under revolving line of credit	15,000			—
Payments on notes payable and long-term debt	(2,755		)	(848		)
Payment of preferred dividends	—			(338		)
Proceeds from employee stock purchases and exercise of stock options	246			716
Other financing activities	(80		)	350
Net cash provided by (used in) financing activities	12,411			(120		)
Effect of change in foreign currency exchange rates on cash and cash equivalents	(24		)	(891		)
Net increase in cash and cash equivalents	49,250			5,604
Cash and cash equivalents at beginning of period	148,056			60,971
Cash and cash equivalents at end of period	$	197,306		$	66,575

See accompanying Notes to Unaudited Condensed Consolidated Financial Statements.

6

ION GEOPHYSICAL CORPORATION AND SUBSIDIARIES

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(1)    Basis of Presentation

The condensed consolidated balance sheet of ION Geophysical Corporation and its subsidiaries (collectively referred to as the “Company” or “ION,” unless the context otherwise requires) at December 31, 2013 has been derived from the Company’s audited consolidated financial statements at that date. The condensed consolidated balance sheet at March 31, 2014, and the condensed consolidated statements of operations, comprehensive income (loss) and cash flows for the three months ended March 31, 2014 and 2013, are unaudited. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. The results of operations for the three months ended March 31, 2014 are not necessarily indicative of the operating results for a full year or of future operations.

In late January 2014, the Company acquired an additional 40% interest in OceanGeo B.V. (“OceanGeo”) through the conversion of the outstanding indebtedness owed to the Company by OceanGeo into additional equity interests of OceanGeo, bringing the Company’s total equity interest to 70% and giving the Company control over OceanGeo. The Company has included in its results of operations, the results of OceanGeo from the date of the Company’s acquisition of the controlling interest.

These condensed consolidated financial statements have been prepared using accounting principles generally accepted in the United States for interim financial information and the instructions to Form 10-Q and applicable rules of Regulation S-X of the Securities and Exchange Commission (the “SEC”). Certain information and footnote disclosures normally included in annual financial statements presented in accordance with accounting principles generally accepted in the United States have been omitted. The accompanying condensed consolidated financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2013 and Amendment No. 1 thereto on Form 10-K/A, which was filed on March 28, 2014 and contains the separate consolidated financial statements of INOVA Geophysical Equipment Limited (“INOVA Geophysical”) for its fiscal year ended December 31, 2013.

(2)Acquisition of Controlling Interest in OceanGeo

In October 2013, the Company reached agreement with its joint venture partner in OceanGeo, Georadar Levantamentos Geofisicos S/A, for the Company to have the option to increase its ownership percentage in OceanGeo from 30% to 70%, subject to certain conditions. OceanGeo is headquartered in Rio de Janeiro, Brazil, and specializes in seismic acquisition operations using ocean-bottom cables deployed from vessels leased by OceanGeo.

To further assist OceanGeo in acquiring backlog, in October 2013 the Company also agreed to loan OceanGeo additional funds for working capital, subject to the Company’s agreement on the necessity and purpose for each advance and certain other conditions, up to a maximum of $25.0 million. As of December 31, 2013, the Company had advanced $15.3 million, and thereafter in January 2014, prior to obtaining the controlling interest, the Company advanced an additional $3.7 million.

In January, the Company exercised its option, increasing its ownership percentage through the conversion of certain outstanding amounts loaned to OceanGeo. The Company acquired its ownership interest in OceanGeo as part of its strategy to expand the range of service offerings it can provide to oil and gas exploration and production customers and to put its Calypso^® seabed acquisition technology to work in a service model to meet the growing demand for seabed seismic services.

The acquisition was accounted for by the acquisition method, whereby the assets acquired and liabilities assumed were recorded at their fair values as of the acquisition date based on an income approach. The estimated fair value of the assets acquired and liabilities assumed approximated the purchase price and therefore no goodwill or bargain purchase was recognized. As of March 31, 2014, the allocation of the purchase price of OceanGeo was based upon preliminary fair value studies, and may be subject to change as additional information becomes available. In connection with the acquisition, the Company incurred $1.3 million in acquisition-related transaction costs related to professional services and fees. These costs were expensed as incurred and were included in other income (expense), net in the Company’s condensed consolidated statement of operations for the three months ended March 31, 2014. As a result of consolidating OceanGeo’s results into the Company’s consolidated results of operations for the period from the acquisition date at the end of January to March 31, 2014, the Company’s results of operations include $20.6 million of OceanGeo revenues and $4.2 million of income from OceanGeo’s operations for the three months ended March 31, 2014. For additional results related to OceanGeo, see Note 3 “Segment Information.” The following table summarizes the fair value assigned to the assets acquired and liabilities assumed, as well as the noncontrolling interest, at the acquisition date (in thousands):

7

Estimated Fair Value of Assets Acquired and Liabilities Assumed:
Cash and cash equivalents	$	609
Accounts receivable	9,247
Prepaid expenses and other current assets	1,433
Multi-client data library	3,876
Property, plant, equipment and seismic rental equipment, net	14,598
Other assets	2,227
Total identifiable assets	31,990
Accounts payable and accrued liabilities	(13,464		)
Bank loans	(6,135		)
Other liabilities	(1,026		)
Net assets	11,365
Noncontrolling interest	(3,410		)
Total consideration	$	7,955

The following summarized unaudited pro forma consolidated income statement information for the three months ended March 31, 2014 and 2013, assumes that the OceanGeo acquisition had occurred as of the beginning of the periods presented. The Company has prepared these unaudited pro forma financial results for comparative purposes only. These unaudited pro forma financial results may not be indicative of the results that would have occurred if ION had completed the acquisition as of the beginning of the periods presented or the results that may be attained in the future. Amounts presented below are in thousands, except for the per share amounts:

Pro forma Consolidated ION Income Statement Information	Three Months Ended March 31,
	2014		2013
Net revenues	$	153,882	$	147,706
Income from operations	$	23,747	$	4,291
Net income	$	77,968	$	4,010
Net income attributable to ION	$	76,821	$	3,164
Basic net income per common share	$	0.47	$	0.02
Diluted net income per common share	$	0.47	$	0.02

(3)Segment Information

The Company operates through four business segments – Solutions, Systems, Software and Ocean Bottom Services (the segment name for OceanGeo) – as well as through its INOVA Geophysical joint venture. See Note 4 “Equity Method Investments” for the summarized financial information for INOVA Geophysical. The Company measures segment operating results based on income from operations.

8

A summary of segment information is as follows (in thousands):

	Three Months Ended March 31,
	2014			2013
Net revenues:
Solutions:
New Venture	$	32,738		$	48,436
Data Library	13,217			9,448
Total multi-client revenues	45,955			57,884
Data Processing	43,286			31,286
Total	$	89,241		$	89,170
Systems:
Towed Streamer	$	11,851		$	13,549
Ocean Bottom Equipment	—			6,765
Other	12,997			11,533
Total	$	24,848		$	31,847
Software:
Software Systems	$	9,154		$	7,941
Services	885			779
Total	$	10,039		$	8,720
Ocean Bottom Services	$	20,570		$	—
Total	$	144,698		$	129,737
Gross profit:
Solutions	$	33,011		$	20,197
Systems	11,417			8,380
Software	7,257			6,380
Ocean Bottom Services	5,169			—
Total	$	56,854		$	34,957
Gross margin:
Solutions	37		%	23		%
Systems	46		%	26		%
Software	72		%	73		%
Ocean Bottom Services	25		%	—		%
Total	39		%	27		%
Income from operations:
Solutions	$	19,112		$	7,357
Systems	3,371			934
Software	5,128			5,161
Ocean Bottom Services	4,162			—
Corporate and other	(12,102		)	(11,529		)
Income from operations	19,671			1,923
Interest expense, net	(4,797		)	(1,066		)
Equity in earnings (losses) of investments	(1,688		)	1,116
Other income, net	68,526			1,027
Income before income taxes	$	81,712		$	3,000

9

(4)Equity Method Investments

The following table reflects the change in the Company’s equity method investments during the three months ended March 31, 2014 (in thousands):

	INOVA Geophysical			OceanGeo			Total
Investments at December 31, 2013	$	51,065		$	2,800		$	53,865
Equity in earnings (losses) of investments	(2,426		)	738			(1,688		)
Advances to OceanGeo (prior to consolidation)	—			3,683			3,683
Acquisition of controlling interest (consolidation) of OceanGeo	—			(7,221		)	(7,221		)
Equity interest in investees' other comprehensive loss	(1,173		)	—			(1,173		)
Investment at March 31, 2014	$	47,466		$	—		$	47,466

INOVA Geophysical — The Company accounts for its 49% interest in INOVA Geophysical as an equity method investment and records its share of earnings and losses of INOVA Geophysical on a one fiscal quarter lag basis. For the three months ended March 31, 2014, the Company recorded its share of losses from INOVA Geophysical of $2.4 million, compared to its share of earnings for the corresponding period in 2013, of $1.9 million. The following table reflects the summarized financial information for INOVA Geophysical for the three months ended December 31, 2013 and 2012 (in thousands):

	Three Months Ended December 31,
	2013			2012
Net revenues	$	40,176		$	59,611
Gross profit	$	4,948		$	12,327
Loss from operations	$	(3,667	)	$	(250	)
Net income (loss)	$	(4,951	)	$	3,742

Related Party Transactions

For information regarding transactions between the Company and its equity method investees, see Note 14 “Related Party Transactions.”

(5)Long-term Debt

Obligations (in thousands)	March 31, 2014			December 31, 2013
Senior secured second-priority notes	$	175,000		$	175,000
Revolving line of credit	50,000			35,000
Equipment capital leases	9,091			8,651
Brazil bank debt	5,649			—
Facility lease obligation	1,273			1,501
Total	241,013			220,152
Current portion of long-term debt and lease obligations	(60,551		)	(5,906		)
Non-current portion of long-term debt and lease obligations	$	180,462		$	214,246

Senior Secured Second-Priority Notes

On May 13, 2013, the Company sold $175.0 million aggregate principal amount of 8.125% Senior Secured Second-Priority Notes due 2018 (“Notes”) in a private offering pursuant to an Indenture dated as of May 13, 2013. The Notes are senior secured second-priority obligations of the Company, are guaranteed by certain of the Company’s U.S. subsidiaries, and mature on May 15, 2018. Interest on the Notes accrues at the rate of 8.125% per annum and will be payable semiannually in arrears on May 15 and November 15 of each year during their term. On April 10, 2014, the Company commenced a registered exchange offer pursuant to which holders of the privately placed Notes that have not been registered under the Securities Act of 1933, as amended (the “Securities Act”), may exchange their Notes for a like principal amount of Notes that have been registered under the Securities Act. Unless extended, the exchange offer will expire at 5:00 p.m., New York City time, on May 9, 2014.

On or after May 15, 2015, the Company may on one or more occasions redeem all or a part of the Notes at the redemption prices set forth below, plus accrued and unpaid interest and special interest, if any, on the Notes redeemed during the 12-month period beginning on May 15th of the years indicated below:

10

Date	Percentage
2015	104.063%
2016	102.031%
2017 and thereafter	100.000%

The Notes are initially jointly and severally guaranteed on a senior secured basis by each of the Company’s current material U.S. subsidiaries: GX Technology Corporation, ION Exploration Production (U.S.A.), Inc. and I/O Marine Systems, Inc. (the “Notes Guarantors”). The Notes and the guarantees are secured, subject to certain exceptions and permitted liens, by second-priority liens on substantially all of the assets that secure the indebtedness under the Company’s senior first-priority secured credit facility with China Merchants Bank Co., Ltd., New York Branch (“CMB”) as administrative agent and lender under the facility (see “— Revolving Line of Credit” below). The indebtedness under the Notes is effectively junior to the Company’s obligations under the senior secured credit facility to the extent of the value of the collateral securing the facility, and to any other indebtedness secured on a first-priority basis to the extent of the value of the Company’s assets subject to those first-priority security interests.

The Notes contain certain covenants that, among other things, limit the Company’s ability and the ability of its restricted subsidiaries. These and other restrictive covenants contained in the Indenture are subject to important exceptions and qualifications. All of the Company’s subsidiaries are currently restricted subsidiaries. As of March 31, 2014, the Company was in compliance with these covenants.

In connection with the offering of the Notes, the Company entered into a consent agreement with CMB, as administrative agent and lender under the Company’s senior secured credit facility. See “— Revolving Line of Credit” below.

In connection with the issuance of the Notes, the Company and the Notes Guarantors entered into a second lien intercreditor agreement dated as of May 13, 2013 (the “Intercreditor Agreement”) with, among others, CMB, as administrative agent, first lien representative for the first lien secured parties and collateral agent for the first lien secured parties, the trustee under the Indenture and the collateral agent for the second lien secured parties. The Intercreditor Agreement provides, among other things, that the liens on the collateral securing the Notes and related obligations will be junior and subordinate in all respects to the liens on the collateral securing the Company’s senior secured credit facility and related obligations.

Revolving Line of Credit

On May 29, 2012, the Company amended the terms of its senior secured credit facility (the “Credit Facility”) with CMB, as administrative agent and lender. The First Amendment to the Credit Agreement and Loan Documents (the “First Amendment”) modified certain provisions of the Company’s senior credit agreement with CMB that it had entered into on March 25, 2010. The maturity date of any outstanding debt under the Credit Facility is March 24, 2015; therefore the outstanding balance of $50.0 million as of March 31, 2014 has been classified as a current obligation.

As amended by the First Amendment, the Credit Facility provides that the Company may make revolving credit borrowings in U.S. Dollars, Euros, British Pounds Sterling or Canadian Dollars up to an amount not to exceed the U.S. Dollar equivalent of $175.0 million. The Company also agreed that no additional borrowings may be made at any time at which the outstanding indebtedness under the revolving line of credit (principal, accrued interest and fees) exceeds the U.S. Dollar equivalent of $175.0 million. The First Amendment eliminated sub-facility limits under the Credit Facility.

The Company’s obligations under the Credit Facility continue to be guaranteed by certain of its material U.S. subsidiaries that remain as parties to the Credit Facility. In addition, INOVA Geophysical continues to provide a bank stand-by letter of credit as credit support for the Company’s obligations under the Credit Facility. The Company also entered into a credit support agreement with INOVA Geophysical whereby the Company has agreed to indemnify INOVA Geophysical for any and all losses sustained by INOVA Geophysical that arise out of INOVA Geophysical’s guarantee.

As amended by the First Amendment, the interest rates per annum on borrowings under the Credit Facility are, at the Company’s option:

• an alternate base rate equal to the sum of (i) the greatest of (a) the prime rate of CMB, (b) a federal funds effective rate plus 0.50%, or (c) an adjusted LIBOR-based rate plus 1.0%, and (ii) an applicable interest margin of 1.4% (reduced from 2.5%); or

• for eurodollar borrowings and borrowings in Euros, Pounds Sterling or Canadian Dollars, the sum of (i) an adjusted LIBOR-based rate, and (ii) an applicable interest margin of 2.4% (reduced from 3.5%).

As of March 31, 2014, the $50.0 million in outstanding revolving loan indebtedness under the Credit Facility accrued interest at a rate of 2.56% per annum.

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The Credit Facility requires compliance with certain financial covenants, including the following:

• maintain a minimum fixed charge coverage ratio, as defined, in an amount equal to at least 1.125 to 1;

• not exceed a maximum leverage ratio, as defined, of 3.25 to 1; and

• maintain a minimum tangible net worth of at least 60% of the Company’s tangible net worth as of March 31, 2010, as defined.

As of March 31, 2014, the Company was in compliance with these financial covenants.

Brazil Bank Debt

In connection with the Company’s acquisition of a controlling interest in OceanGeo, OceanGeo’s existing debt was consolidated into the Company’s accounts. As of March 31, 2014, the outstanding amount, denominated in Brazilian Reais, of this debt was $5.6 million, with various maturity dates in 2014 and 2015; the latest being November 3, 2015. Interest on this debt accrues at an average rate of 15.68%.

(6)Net Income per Share

Basic net income per common share is computed by dividing net income applicable to common shares by the weighted average number of common shares outstanding during the period. Diluted net income per common share is determined based on the assumption that dilutive restricted stock and restricted stock unit awards have vested and outstanding dilutive stock options have been exercised and the aggregate proceeds were used to reacquire common stock using the average price of such common stock for the period. The total number of shares issued or reserved for future issuance under outstanding stock options at March 31, 2014 and 2013 was 9,660,100 and 7,717,937, respectively, and the total number of shares of restricted stock and shares reserved for restricted stock units outstanding at March 31, 2014 and 2013 was 1,237,123 and 1,034,280, respectively.

Prior to September 30, 2013, there were 27,000 shares outstanding of the Company’s Series D Cumulative Convertible Preferred Stock (“Series D Preferred Stock”). On September 30, 2013, the holder converted all of the outstanding shares of Series D Preferred Stock into 6,065,075 shares of common stock. The then-outstanding shares of Series D Preferred Stock were anti-dilutive for the three months ended March 31, 2013.

The following table summarizes the computation of basic and diluted net income per common share (in thousands, except per share amounts):

	Three Months Ended March 31,
	2014		2013
Net income applicable to common shares	$	75,979	$	1,537
Weighted average number of common shares outstanding	163,847		156,465
Effect of dilutive stock awards	214		850
Weighted average number of diluted common shares outstanding	164,061		157,315
Basic net income per share	$	0.46	$	0.01
Diluted net income per share	$	0.46	$	0.01

(7)Income Taxes

The Company maintains a valuation allowance for substantially all of its deferred tax assets. The valuation allowance is calculated in accordance with the provisions of the Financial Accounting Standards Board’s (“FASB”) Accounting Standard Codification Topic 740 “Income Taxes,” which requires that a valuation allowance be established or maintained when it is “more likely than not” that all or a portion of deferred tax assets will not be realized. In the event the Company’s expectations of future operating results change, the valuation allowance may need to be adjusted upward or downward. As of March 31, 2014, the Company’s unreserved U.S. deferred tax assets totaled $3.8 million. These existing unreserved deferred tax assets are currently considered to be “more likely than not” realized.

The Company’s effective tax rates for the three months ended March 31, 2014 and 2013 were 6.4% and 40.0%, respectively. The Company’s effective tax rate for the first quarter of 2014 was positively impacted by the change in valuation allowance related to the reduction of the legal contingency reserve, offset by the impact of pre-tax losses of OceanGeo within certain jurisdictions for which it could not recognize a tax benefit to offset its tax expenses. Excluding the change in valuation allowance, the Company’s effective tax rate for the first quarter of 2014 was 43.3%.

12

The Company has approximately $2.2 million of unrecognized tax benefits and does not expect to recognize significant increases in unrecognized tax benefits during the next 12-month period. Interest and penalties, if any, related to unrecognized tax benefits are recorded in income tax expense.

As of March 31, 2014, the Company’s U.S. federal tax returns for 2007 and subsequent years remain subject to examination by tax authorities. The Company is no longer subject to U.S. Internal Revenue Service (“IRS”) examination for periods prior to 2007, although carryforward attributes that were generated prior to 2007 may still be adjusted upon examination by the IRS if they either have been or will be used in an open year. In the Company’s foreign tax jurisdictions, tax returns for 2010 and subsequent years generally remain open to examination.

(8)Litigation

WesternGeco

In June 2009, WesternGeco L.L.C. (“WesternGeco”) filed a lawsuit against the Company in the United States District Court for the Southern District of Texas, Houston Division. In the lawsuit, styled WesternGeco L.L.C. v. ION Geophysical Corporation, WesternGeco alleged that the Company had infringed several method and apparatus claims contained in four of its United States patents regarding marine seismic streamer steering devices. WesternGeco sought unspecified monetary damages and an injunction prohibiting the Company from making, using, selling, offering for sale or supplying any infringing products in the United States.

In June 2010, WesternGeco filed a lawsuit against various subsidiaries and affiliates of Fugro N.V. (“Fugro”), one of the Company’s seismic contractor customers, accusing Fugro of infringing the same United States patents regarding marine seismic streamer steering devices by planning to use certain equipment purchased from the Company on a survey located outside of U.S. territorial waters. The court approved the consolidation of the Fugro case with the case against the Company. Fugro filed a motion to dismiss the lawsuit, and in March 2011, the presiding judge granted Fugro’s motion to dismiss in part, on the basis that the alleged activities of Fugro would occur more than 12 miles from the U.S. coast and therefore are not actionable under U.S. patent infringement law. In response to a Motion for Summary Judgment filed jointly by the Company and Fugro, the Court ruled in April 2012 that the Company did not directly infringe WesternGeco’s method patent claims. In a pre-trial ruling on June 29, 2012, the Court ruled that, if a particular patent claim of WesternGeco was held to be valid and enforceable at the trial, the Company’s supplying of its DigiFIN^® lateral streamer control units and related software from the United States to its customers overseas with an intention for the customers to combine DigiFIN and such related software with other required components of the patent claim, would infringe one claim in one of WesternGeco’s asserted patents, U.S. Patent No. 7,293,520.

The trial began on July 23, 2012. During the trial, Fugro settled all claims asserted against it by WesternGeco and obtained a global license from WesternGeco. A verdict was returned by the jury on August 16, 2012, finding that the Company willfully infringed the claims contained in the four patents by supplying DigiFIN and the related software from the United States and awarded WesternGeco the sum of $105.9 million in damages, consisting of $12.5 million in reasonable royalty and $93.4 million in lost profits.

In September 2012, the Company filed motions with the trial court to overturn all or portions of the verdict. In June 2013, the presiding judge entered a Memorandum and Order rejecting the jury’s finding of willfulness and denying WesternGeco’s motions for willfulness and enhanced damages, but also denying the Company’s post-verdict motions that challenged the jury’s infringement findings and the damages amount. In the Memorandum and Order, the judge also stated that he would approve WesternGeco’s motion for a permanent injunction and that WesternGeco is entitled to be awarded supplemental damages for the additional DigiFIN units that were supplied from the United States before and after trial that were not included in the jury verdict due to the timing of the trial. On October 24, 2013, the judge entered another Memorandum and Order, ruling on the number of DigiFIN units that are subject to supplemental damages and also ruling that the supplemental damages applicable to the additional units should be calculated by adding together the jury’s previous reasonable royalty and lost profits damages awards per unit, resulting in supplemental damages of $73.1 million. The October 2013 Memorandum and Order also concluded that the Company’s infringement involving the supplemental units was not willful and that WesternGeco was not entitled to receive enhanced damages.

On April 30, 2014, the judge entered another Order, ruling that lost profits should not have been included in the calculation of supplemental damages in the October 2013 Memorandum and Order and reducing the supplemental damages award in the case from $73.1 million to $9.4 million. In the Order, the judge also further reduced the damages award in the case by $3.0 million to reflect a settlement and license that WesternGeco entered into with a customer of the Company that had purchased and used DigiFIN units that were also included in the damages amounts awarded against the Company. After accounting for the above court-ordered reductions, the total damages award in the case now consists of approximately $123.8 million, consisting of adjusted jury verdict and supplemental damages, court costs and estimates of prejudgment interest.

13

The Company intends to appeal the judgment to the United States Court of Appeals for the Federal Circuit. WesternGeco also has the right to elect to appeal the final judgment.

The trial court has ruled that it will also enter a permanent injunction against the Company. As of the filing date of this Quarterly Report on Form 10-Q, the Court had not issued the definitive terms of the permanent injunction. Until the permanent injunction is entered, the final terms of the injunction cannot be known for certain, but it is likely that the permanent injunction will prohibit the Company from supplying its DigiFIN units, two parts that are unique to the DigiFIN product and related software from the United States to its customers overseas with an intention for the customers to combine DigiFIN and the software with other required components of the patent claims. The Company has conducted its business in compliance with the Court’s orders in the case, and the Company has reorganized its operations such that it no longer supplies DigiFIN units, the unique DigiFIN parts or the related software from the United States.

Based on the Company’s analysis after the trial court’s Memorandum and Order in June 2013 denying the Company’s post-verdict motions that challenged the jury’s infringement findings and the damages amount, the Company increased its loss contingency accrual related to this case from $10.0 million to $120.0 million, consisting of jury verdict damages, court costs, and estimates of prejudgment interest and supplemental damages. Based on the Company’s analysis after the trial court’s Memorandum and Order in October 2013 awarding supplemental damages, the Company further increased its loss contingency accrual related to this case from $120.0 million to $193.3 million at December 31, 2013, consisting of jury verdict damages, supplemental damages, court costs, and estimates of prejudgment interest. As a result of the Order entered in April 2014, the Company reversed its prior loss contingency accrual by approximately $70.0 million, resulting in a loss contingency accrual of $123.8 million at March 31, 2014. Additional interest will continue to accrue until this legal matter is fully resolved.

The Company’s assessment of its potential loss contingency may change in the future due to developments at the trial court or appellate court and other events, such as changes in applicable law, and such reassessment could lead to the determination that no loss contingency is probable or that a greater or lesser loss contingency is probable. Any such reassessment could have a material effect on the Company’s financial condition or results of operations.

As stated above, the Company intends to appeal the trial court judgment to the United States Court of Appeals for the Federal Circuit. In order to stay the judgment during the appeal, the Company will be required to post an appeal bond with the trial court. The amount of the appeal bond is in the discretion of the trial court judge and could be required to be up to the full amount of damages entered in the judgment, plus court costs and interest; however, in the Order entered in April 2014, the judge agreed that the appeal bond amount required to be posted by the Company will be $120.0 million. The Company has arranged with sureties to post an appeal bond on its behalf. The terms of the appeal bond arrangements provide the sureties the contractual right for as long as the bond is outstanding to require the Company to post cash collateral for up to the full amount of the bond; however, as a result of the reduced damages amount, the sureties have informed the Company that they will not require cash collateral upon the posting of the appeal bond. Until an appeal bond is posted, the terms applicable to the appeal bond, including collateral required to secure the bond, are not final.

If the sureties exercise their right to require collateral while the appeal bond is outstanding, the Company would intend to utilize a combination of cash on hand and undrawn balances available under its revolving line of credit. If the Company is required to collateralize the full amount of the bond, the Company might also seek additional debt and/or equity financing. The collateralization of the full amount of the bond could have an adverse effect on the Company’s liquidity. Any requirements that the Company collateralize the appeal bond will reduce its liquidity and may reduce the borrowings otherwise available under its Credit Facility. The current maturity date of any outstanding debt under the Company’s Credit Facility is March 2015. No assurances can be made whether the Company’s efforts to raise additional cash would be successful and, if so, on what terms and conditions, and at what cost the Company might be able to secure any such financing.

If the Company is unable to post the appeal bond, the Company will be unable to stay enforcement of the trial court judgment during the appeal of the judgment. The Company is unable to predict the timing of the posting of the required appeal bond.

Other

The Company has been named in various other lawsuits or threatened actions that are incidental to its ordinary business. Litigation is inherently unpredictable. Any claims against the Company, whether meritorious or not, could be time-consuming, cause the Company to incur costs and expenses, require significant amounts of management time and result in the diversion of significant operational resources. The results of these lawsuits and actions cannot be predicted with certainty. Management currently believes that the ultimate resolution of these matters will not have a material adverse impact on the financial condition, results of operations or liquidity of the Company.

14

(9)Other Income, Net

A summary of other income, net is as follows (in thousands):

	Three Months Ended March 31,
	2014			2013
Reduction of accrual for loss contingency related to legal proceedings (Note 8)	$	69,557		$	—
Other income (expense), net	(1,031		)	1,027
Total other income, net	$	68,526		$	1,027

(10)Details of Selected Balance Sheet Accounts

Inventories

A summary of inventories is as follows (in thousands):	March 31, 2014			December 31, 2013
Raw materials and subassemblies	$	56,252		$	54,168
Work-in-process	2,428			2,297
Finished goods	27,285			33,263
Reserve for excess and obsolete inventories	(31,256		)	(32,555		)
Total	$	54,709		$	57,173

Other Long-term Liabilities

A summary of other long-term liabilities is as follows (in thousands):	March 31, 2014		December 31, 2013
Accrual for loss contingency related to legal proceedings (Note 8)	$	123,770	$	193,327
Facility restructuring accrual	4,818		4,837
Other long-term liabilities	14,399		12,438
Total	$	142,987	$	210,602

(11)Accumulated Other Comprehensive Income (Loss)

A summary of changes in accumulated other comprehensive income (loss) by component is as follows (in thousands):

	Foreign currency translation adjustments			Equity interest in investees’ other comprehensive income (loss)			Other changes in other comprehensive income (loss)			Total
Accumulated other comprehensive income (loss) at December 31, 2013	$	(11,923	)	$	841		$	(56	)	$	(11,138	)
Net current-period other comprehensive income (loss)	486			(1,173		)	26			(661		)
Accumulated other comprehensive income (loss) at March 31, 2014	$	(11,437	)	$	(332	)	$	(30	)	$	(11,799	)

(12)Supplemental Cash Flow Information and Non-cash Activity

A summary of non-cash items from investing and financing activities is as follows (in thousands):

	Three Months Ended March 31,
	2014		2013
Purchases of computer equipment financed through capital leases	$	1,952	$	—
Transfer of inventory to property, plant, equipment and seismic rental equipment	$	2,308	$	134

(13)Fair Value of Financial Instruments

Authoritative guidance on fair value measurements defines fair value, establishes a framework for measuring fair value and stipulates the related disclosure requirements. The Company follows a three-level hierarchy, prioritizing and defining the types of inputs used to measure fair value.

Investment in Convertible Note. In March 2012, the Company and a privately owned U.S.-based technology company entered into an agreement for the Company to make available to the technology company a credit facility in an amount of up to $4.0 million. The credit facility has since been amended, such that the current maturity date is March 2015, the annual interest rate is 0.25%, and the conversion provision allows for conversion of any or all of the outstanding balance of the promissory note under the credit facility into common shares of the technology company. As of March 31, 2014, the technology company had drawn $4.0 million under this credit arrangement.

15

The Company performed a fair value analysis with respect to its investment in the convertible note using Level 3 inputs. These inputs included a market approach, including the terms and likelihood of an investment event. As of March 31, 2014, the fair value of this investment was approximately $4.2 million, including accrued interest.

Fair Value of Other Financial Instruments. Due to their highly liquid nature, the amount of the Company’s other financial instruments, including cash and cash equivalents, accounts and unbilled receivables, notes receivable, accounts payable, and accrued multi-client data library royalties, represent their approximate fair value.

The carrying amounts of the Company’s long-term debt as of March 31, 2014 and December 31, 2013 were $241.0 million and $220.2 million, respectively, compared to its fair values of $228.8 million and $190.4 million as of March 31, 2014 and December 31, 2013, respectively. The fair value of the long-term debt was calculated using a market approach based upon Level 2 inputs, including a price quote from a major financial institution.

The Company’s cost method investments for which quoted market prices are not available are recorded at cost and reviewed periodically if there are events or changes in circumstances that may have a significant adverse effect on the fair value of the investments.

(14)Related Party Transactions

BGP Inc. (“BGP”) owned approximately 14.5% of the Company’s outstanding common stock as of March 31, 2014. For the three months ended March 31, 2014 and 2013, the Company recorded revenues from BGP of $2.0 million and $0.9 million, respectively. Total receivables due from BGP were $2.4 million at March 31, 2014.

In July 2013, the Company agreed to lend up to $10.0 million to INOVA Geophysical, and received a promissory note issued by INOVA Geophysical to the order of the Company, which was originally scheduled to mature on September 30, 2013. The maturity date of the promissory note has since been extended to June 30, 2014. The loan was made by the Company to support certain short-term working capital needs of INOVA Geophysical. The indebtedness under the note accrues interest at an annual rate equal to the London Interbank Offered Rate plus 650 basis points. In 2013, the Company advanced the full principal amount of $10.0 million to INOVA Geophysical under the promissory note. INOVA Geophysical has repaid a total of $6.0 million, of which $4.0 million remains outstanding at March 31, 2014.

(15)Recent Accounting Pronouncements

Reporting Discontinued Operations — In April 2014, the FASB issued amendments to guidance for reporting discontinued operations and disposals of components of an entity. The amended guidance requires that a disposal representing a strategic shift that has (or will have) a major effect on an entity’s financial results or a business activity classified as held for sale should be reported as discontinued operations. The amendments also expand the disclosure requirements for discontinued operations and add new disclosures for individually significant dispositions that do not qualify as discontinued operations. The amendments are effective prospectively for fiscal years, and interim reporting periods within those years, beginning after December 15, 2014 (early adoption is permitted only for disposals that have not been previously reported). The implementation of the amended guidance is not expected to have a material impact on the Company’s consolidated financial position or results of operations.

(16)Condensed Consolidating Financial Information

In 2013, the Company sold $175.0 million of its 8.125% Senior Secured Second-Priority Notes due 2018. The Notes were issued by ION Geophysical Corporation and are guaranteed by the Company’s current material U.S. subsidiaries: GX Technology Corporation, ION Exploration Products (U.S.A.), Inc. and I/O Marine Systems, Inc. (“the Guarantors”), which are 100-percent-owned subsidiaries. The Guarantors have fully and unconditionally guaranteed the payment obligations of ION Geophysical Corporation with respect to these debt securities. The following condensed consolidating financial information presents the results of operations, financial position and cash flows for:

• ION Geophysical Corporation and the Guarantors (in each case, reflecting investments in subsidiaries utilizing the equity method of accounting).

• All other subsidiaries of ION Geophysical Corporation that are not Guarantors.

• The consolidating adjustments necessary to present ION Geophysical Corporation’s results on a consolidated basis.

This condensed consolidating financial information should be read in conjunction with the accompanying consolidated financial statements and notes.

16

	March 31, 2014
Balance Sheet	ION Geophysical Corporation			The Guarantors			All Other Subsidiaries			Consolidating Adjustments			Total Consolidated
	(In thousands)
ASSETS
Current assets:
Cash and cash equivalents	$	154,845		$	1,539		$	40,922		$	—		$	197,306
Accounts receivable, net	2,532			46,308			49,391			—			98,231
Unbilled receivables	—			55,168			13,284			—			68,452
Inventories	—			5,658			49,051			—			54,709
Prepaid expenses and other current assets	12,087			4,897			10,391			(1,770		)	25,605
Total current assets	169,464			113,570			163,039			(1,770		)	444,303
Deferred income tax asset	6,500			6,675			758			406			14,339
Property, plant, equipment and seismic rental equipment, net	6,152			29,977			23,682			—			59,811
Multi-client data library, net	—			213,272			29,811			—			243,083
Equity method investments	47,466			—			—			—			47,466
Investment in subsidiaries	785,917			256,637			—			(1,042,554		)	—
Goodwill	—			26,984			29,127			—			56,111
Intangible assets, net	—			7,747			2,819			—			10,566
Intercompany receivables	50,557			—			—			(50,557		)	—
Other assets	13,845			46			24,249			(22,500		)	15,640
Total assets	$	1,079,901		$	654,908		$	273,485		$	(1,116,975	)	$	891,319
LIABILITIES AND EQUITY
Current liabilities:
Current maturities of long-term debt	$	50,000		$	4,794		$	5,757		$	—		$	60,551
Accounts payable	2,001			13,078			23,575			—			38,654
Accrued expenses	15,888			41,532			16,133			(1,082		)	72,471
Accrued multi-client data library royalties	—			37,648			615			—			38,263
Deferred revenue	—			12,689			3,341			—			16,030
Total current liabilities	67,889			109,741			49,421			(1,082		)	225,969
Long-term debt, net of current maturities	175,000			4,073			1,389			—			180,462
Intercompany payables	467,223			34,145			16,412			(517,780		)	—
Other long-term liabilities	33,957			121,617			10,195			(22,782		)	142,987
Total liabilities	744,069			269,576			77,417			(541,644		)	549,418
Redeemable noncontrolling interests	—			—			5,552			—			5,552
Stockholders’ equity:
Common stock	1,640			290,460			22,362			(312,822		)	1,640
Additional paid-in capital	882,892			175,005			235,994			(410,999		)	882,892
Accumulated earnings (deficit)	(530,178		)	324,015			(69		)	(323,946		)	(530,178		)
Accumulated other comprehensive income (loss)	(11,799		)	6,217			(11,430		)	5,213			(11,799		)
Due from ION Geophysical Corporation	—			(410,365		)	(56,858		)	467,223			—
Treasury stock	(6,565		)	—			—			—			(6,565		)
Total stockholders’ equity	335,990			385,332			189,999			(575,331		)	335,990
Noncontrolling interests	(158		)	—			517			—			359
Total equity	335,832			385,332			190,516			(575,331		)	336,349
Total liabilities and equity	$	1,079,901		$	654,908		$	273,485		$	(1,116,975	)	$	891,319

17

	December 31, 2013
Balance Sheet	ION Geophysical Corporation			The Guarantors			All Other Subsidiaries			Consolidating Adjustments			Total Consolidated
	(In thousands)
ASSETS
Current assets:
Cash and cash equivalents	$	124,701		$	—		$	23,355		$	—		$	148,056
Accounts receivable, net	1,874			99,547			48,027			—			149,448
Unbilled receivables	—			33,490			15,978			—			49,468
Inventories	—			6,595			50,578			—			57,173
Prepaid expenses and other current assets	12,888			5,030			7,438			(584		)	24,772
Total current assets	139,463			144,662			145,376			(584		)	428,917
Deferred income tax asset	6,513			6,960			489			688			14,650
Property, plant, equipment and seismic rental equipment, net	6,440			29,845			10,399			—			46,684
Multi-client data library, net	—			212,572			26,212			—			238,784
Equity method investments	51,065			—			2,800			—			53,865
Investment in subsidiaries	699,695			248,482			—			(948,177		)	—
Goodwill	—			26,984			28,892			—			55,876
Intangible assets, net	—			8,246			3,001			—			11,247
Intercompany receivables	8,313			13,419			—			(21,732		)	—
Other assets	14,315			56			24,262			(23,985		)	14,648
Total assets	$	925,804		$	691,226		$	241,431		$	(993,790	)	$	864,671
LIABILITIES AND EQUITY
Current liabilities:
Current maturities of long-term debt	$	—		$	4,716		$	1,190		$	—		$	5,906
Accounts payable	3,515			11,741			7,364			34			22,654
Accrued expenses	16,652			54,250			13,392			64			84,358
Accrued multi-client data library royalties	—			45,921			539			—			46,460
Deferred revenue	—			16,387			4,295			—			20,682
Total current liabilities	20,167			133,015			26,780			98			180,060
Long-term debt, net of current maturities	210,000			3,655			591			—			214,246
Intercompany payables	426,134			—			21,732			(447,866		)	—
Other long-term liabilities	11,757			214,211			8,637			(24,003		)	210,602
Total liabilities	668,058			350,881			57,740			(471,771		)	604,908
Redeemable noncontrolling interests	—			—			1,878			—			1,878
Stockholders’ equity:
Common stock	1,637			290,460			19,138			(309,598		)	1,637
Additional paid-in capital	879,969			180,700			235,381			(416,081		)	879,969
Accumulated earnings (deficit)	(606,157		)	232,186			(4,010		)	(228,176		)	(606,157		)
Accumulated other comprehensive income (loss)	(11,138		)	6,218			(11,920		)	5,702			(11,138		)
Due from ION Geophysical Corporation	—			(369,219		)	(56,915		)	426,134			—
Treasury stock	(6,565		)	—			—			—			(6,565		)
Total stockholders’ equity	257,746			340,345			181,674			(522,019		)	257,746
Noncontrolling interests	—			—			139			—			139
Total equity	257,746			340,345			181,813			(522,019		)	257,885
Total liabilities and equity	$	925,804		$	691,226		$	241,431		$	(993,790	)	$	864,671

18

	Three Months Ended March 31, 2014
Income Statement	ION Geophysical Corporation			The Guarantors			All Other Subsidiaries			Consolidating Adjustments			Total Consolidated
	(In thousands)
Total net revenues	$	—		$	78,122		$	66,576		$	—		$	144,698
Cost of goods sold	—			43,996			43,848			—			87,844
Gross profit	—			34,126			22,728			—			56,854
Total operating expenses	9,021			15,255			12,907			—			37,183
Income (loss) from operations	(9,021		)	18,871			9,821			—			19,671
Interest expense, net	(4,573		)	(42		)	(182		)	—			(4,797		)
Intercompany interest, net	66			(435		)	369			—			—
Equity in earnings (losses) of investments	89,488			3,856			738			(95,770		)	(1,688		)
Other income (expense)	497			69,911			(1,882		)	—			68,526
Net income before income taxes	76,457			92,161			8,864			(95,770		)	81,712
Income tax expense	478			332			4,453			—			5,263
Net income	75,979			91,829			4,411			(95,770		)	76,449
Net income attributable to noncontrolling interests	—			—			(470		)	—			(470		)
Net income applicable to common shares	$	75,979		$	91,829		$	3,941		$	(95,770	)	$	75,979
Comprehensive net income	$	75,318		$	91,828		$	4,901		$	(96,259	)	$	75,788
Comprehensive income attributable to noncontrolling interest	—			—			(470		)	—			(470		)
Comprehensive net income attributable to ION	$	75,318		$	91,828		$	4,431		$	(96,259	)	$	75,318

	Three Months Ended March 31, 2013
Income Statement	ION Geophysical Corporation			The Guarantors			All Other Subsidiaries			Consolidating Adjustments			Total Consolidated
	(In thousands)
Total net revenues	$	—		$	73,922		$	55,815		$	—		$	129,737
Cost of goods sold	—			60,183			34,597			—			94,780
Gross profit	—			13,739			21,218			—			34,957
Total operating expenses	8,030			16,357			8,647			—			33,034
Income (loss) from operations	(8,030		)	(2,618		)	12,571			—			1,923
Interest expense, net	(1,025		)	22			(63		)	—			(1,066		)
Intercompany interest, net	82			(269		)	187			—			—
Equity in earnings (losses) of investments	5,837			6,634			(735		)	(10,620		)	1,116
Other income	340			8			679			—			1,027
Net income (loss) before income taxes	(2,796		)	3,777			12,639			(10,620		)	3,000
Income tax expense (benefit)	(4,671		)	(768		)	6,640			—			1,201
Net income	1,875			4,545			5,999			(10,620		)	1,799
Net loss attributable to noncontrolling interests	—			—			76			—			76
Net income attributable to ION	1,875			4,545			6,075			(10,620		)	1,875
Preferred stock dividends	338			—			—			—			338
Net income applicable to common shares	$	1,537		$	4,545		$	6,075		$	(10,620	)	$	1,537
Comprehensive net income (loss)	$	(1,781	)	$	4,546		$	2,275		$	(6,897	)	$	(1,857	)
Comprehensive loss attributable to noncontrolling interest	—			—			76			—			76
Comprehensive net income (loss) attributable to ION	$	(1,781	)	$	4,546		$	2,351		$	(6,897	)	$	(1,781	)

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	Three Months Ended March 31, 2014
Statement of Cash Flows	ION Geophysical Corporation			The Guarantors			All Other Subsidiaries			Consolidating Adjustments		Total Consolidated
	(In thousands)
Cash flows from operating activities:
Net cash provided by operating activities	$	15,105		$	19,989		$	27,588		$	—	$	62,682
Cash flows from investing activities:
Cash invested in multi-client data library	—			(22,299		)	(54		)	—		(22,353		)
Purchase of property, plant, equipment and seismic rental equipment	(551		)	(1,230		)	(216		)	—		(1,997		)
Repayment of advances by INOVA Geophysical	1,000			—			—			—		1,000
Investment in and advances to OceanGeo B.V.	—			—			(3,683		)	—		(3,683		)
Cash of OceanGeo B.V. upon acquiring a controlling interest	—			—			609			—		609
Other investing activities	579			26			—			—		605
Net cash provided by (used in) investing activities	1,028			(23,503		)	(3,344		)	—		(25,819		)
Cash flows from financing activities:
Borrowings under revolving line of credit	15,000			—			—			—		15,000
Payments on notes payable and long-term debt	—			(1,365		)	(1,390		)	—		(2,755		)
Intercompany lending	(1,155		)	6,418			(5,263		)	—		—
Proceeds from employee stock purchases and exercise of stock options	246			—			—			—		246
Other financing activities	(80		)	—			—			—		(80		)
Net cash provided by (used in) financing activities	14,011			5,053			(6,653		)	—		12,411
Effect of change in foreign currency exchange rates on cash and cash equivalents	—			—			(24		)	—		(24		)
Net increase in cash and cash equivalents	30,144			1,539			17,567			—		49,250
Cash and cash equivalents at beginning of period	124,701			—			23,355			—		148,056
Cash and cash equivalents at end of period	$	154,845		$	1,539		$	40,922		$	—	$	197,306

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	Three Months Ended March 31, 2013
Statement of Cash Flows	ION Geophysical Corporation			The Guarantors			All Other Subsidiaries			Consolidating Adjustments		Total Consolidated
	(In thousands)
Cash flows from operating activities:
Net cash provided by operating activities	$	16,769		$	7,813		$	25,009		$	—	$	49,591
Cash flows from investing activities:
Cash invested in multi-client data library	—			(13,076		)	(15,702		)	—		(28,778		)
Purchase of property, plant, equipment and seismic rental equipment	—			(3,774		)	—			—		(3,774		)
Investment in and advances to OceanGeo B.V.	(8,000		)	—			(1,500		)	—		(9,500		)
Investment in convertible notes	(1,000		)	—			—			—		(1,000		)
Other investing activities	—			—			76			—		76
Net cash used in investing activities	(9,000		)	(16,850		)	(17,126		)	—		(42,976		)
Cash flows from financing activities:
Payments on notes payable and long-term debt	—			(597		)	(251		)	—		(848		)
Intercompany lending	(26,286		)	9,634			16,652			—		—
Payment of preferred dividends	(338		)	—			—			—		(338		)
Proceeds from employee stock purchases and exercise of stock options	716			—			—			—		716
Other financing activities	350			—			—			—		350
Net cash provided by (used in) financing activities	(25,558		)	9,037			16,401			—		(120		)
Effect of change in foreign currency exchange rates on cash and cash equivalents	—			—			(891		)	—		(891		)
Net increase (decrease) in cash and cash equivalents	(17,789		)	—			23,393			—		5,604
Cash and cash equivalents at beginning of period	30,343			—			30,628			—		60,971
Cash and cash equivalents at end of period	$	12,554		$	—		$	54,021		$	—	$	66,575

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Item 2.Management’s Discussion and Analysis of Financial Condition and Results of Operations

Executive Summary

Our Business

In this Form 10-Q, “ION Geophysical,” “ION,” “the company” (or, “the Company”), “we,” “our,” “ours” and “us” refer to ION Geophysical Corporation and its consolidated subsidiaries, except where the context otherwise requires or as otherwise indicated.

The information contained in this Quarterly Report on Form 10-Q contains references to trademarks, service marks and registered marks of ION and our subsidiaries, as indicated. Except where stated otherwise or unless the context otherwise requires, the terms “GeoVentures,” “DigiFIN,” “VectorSeis,” “Orca,” “GATOR,” “G3i” and “Hawk” refer to GeoVentures^®, DigiFIN^®, VECTORSEIS^®, ORCA^®, GATOR^®, G3i^® and Hawk^® registered marks owned by ION or INOVA Geophysical, and the terms “Calypso,” “WiBand” and “Narwhal” refer to Calypso™, WiBand™ and Narwhal™ trademarks and service marks owned by ION or INOVA Geophysical.

We are a global, technology-focused company that provides geophysical technology, services and solutions to the global oil and gas industry. Our offerings are designed to allow oil and gas exploration and production (“E&P”) companies to obtain higher resolution images of the earth’s subsurface during exploration, exploitation and production operations to reduce the risk in exploration and reservoir development, and to enable seismic contractors to acquire geophysical data safely and efficiently. We acquire and process seismic data from seismic surveys in regional data programs, which then become part of our seismic data library. The seismic surveys for our data library business are pre-funded, or underwritten, in part by our customers, and, with the exception of OceanGeo B.V. (“OceanGeo”), our new seabed data acquisition business that we own a controlling interest, we contract with third party seismic data acquisition companies to shoot and acquire the seismic data, all of which is intended to minimize our risk exposure in offshore and onshore operations around the world. We serve customers in all major energy producing regions of the world from strategically located offices in 21 cities on six continents.

Seismic imaging plays a fundamental role in hydrocarbon exploration and reservoir development by delineating structures, rock types and fluid locations in the subsurface. This is perhaps the most critical element in a successful E&P exploration program, yet it is a relatively small percentage of the total exploration and development spend. Our services, technologies and products are used by E&P companies and seismic acquisition contractors to generate high-resolution images of the Earth’s subsurface to identify sources of hydrocarbons and pinpoint drilling locations for wells, which can be costly and involve high risk.

For over 45 years we have been engaged in providing innovative seismic data acquisition technology, such as full-wave imaging capability with VectorSeis products, the ability to record seismic data from basins that underlie ice fields in polar regions and cableless seismic techniques. The advanced technologies we currently offer include Orca, our WiBand data processing technology, Calypso, Narwhal and INOVA Geophysical’s cableless Hawk land system and new G3i cabled system, and other technologies, each of which is designed to deliver improvements in both image quality and productivity. We have more than 550 patents and pending patent applications in various countries around the world. Approximately 50% of our employees are involved in technical roles and approximately 20% of our employees have advanced degrees.

We provide our services and products through four business segments – Solutions, Software, Systems and Ocean Bottom Services (the segment name for OceanGeo) – as well as through our INOVA Geophysical joint venture.

Solutions. Our Solutions business provides two distinct service activities that often work together.

Our GeoVentures services are designed to manage the entire seismic process, from survey planning and design to data acquisition and management, and to final subsurface imaging and reservoir characterization. The GeoVentures group focuses on the technologically intensive components of the image development process, such as survey planning and design, and data processing and interpretation, outsourcing the logistics components (such as field acquisition) to experienced seismic and other geophysical contractors.

Our GXT Imaging Solutions group offers processing and imaging services designed to help our E&P customers reduce exploration and production risk, evaluate and develop reservoirs, and increase production. GXT develops a series of subsurface images by applying its processing technology to data owned or licensed by its customers and also provides its customers with support services (including onboard seismic vessel systems), such as data pre-conditioning for imaging, and outsourced management (including quality control) of seismic data acquisition and image processing services. We maintain approximately 10.5 petabytes of seismic data digital information storage in 12 global data centers, including our largest data center in Houston.

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Our Solutions business focuses on providing services and products for: challenging environments, such as the Arctic frontier; complex and hard-to-image geologies, such as deepwater subsurface salt formations in the Gulf of Mexico and offshore West Africa and Brazil; unconventional reservoirs, such as those found in shale, tight gas and oil sands formations; and offshore basin-wide seismic data and imaging programs. Since 2002, our basin exploration seismic data programs have resulted in a substantial data library that covers significant portions of many of the frontier basins in the world, including offshore East and West Africa, India, South America, the Arctic, the deepwater Gulf of Mexico and Australia.

Software. Our Software business provides command and control software systems and related services for navigation and data management involving towed marine streamer and seabed operations. Our proprietary software, with over 13 million lines of code, is installed on towed streamer marine vessels worldwide and is a component of many re-deployable and permanent seabed monitoring systems. Through our Software business, we provide marine imaging, seabed imaging and survey design, planning and optimization.

In 2013, we announced the launch of our Narwhal system, which is designed to enable operators to gather, monitor, and analyze data from various sources, including satellite imagery, ice charts, radar, manual observations, wind and ocean currents, in order to forecast weather and predict ice movements in the harsh environments of the Arctic. We believe that this system will give operators the ability to better track, forecast, and monitor potential ice threats, and thereby make informed, proactive decisions to ensure the safety of individuals, assets, and the environment while minimizing operational downtime.

Systems. Our Systems business is engaged in the manufacture of (i) re-deployable ocean-bottom cable seismic data acquisition systems and shipboard recorders; (ii) marine towed streamer positioning and control systems and energy sources; and (iii) analog geophone sensors.

Ocean Bottom Services. Through our acquisition of a controlling interest in OceanGeo, we provide seabed seismic acquisition services to E&P customers using ocean-bottom equipment manufactured in our Systems segment. For information regarding our acquisition of OceanGeo, see Note 2 “Acquisition of Controlling Interest in OceanGeo” of Notes to Unaudited Condensed Consolidated Financial Statements contained elsewhere in this Quarterly Report on Form 10-Q.

INOVA Geophysical. We conduct our land seismic equipment business through INOVA Geophysical Equipment Limited (“INOVA Geophysical” or “INOVA”), which is a joint venture with BGP Inc. (“BGP”). BGP is a subsidiary of China National Petroleum Corporation, and is generally regarded as the world’s largest land geophysical service contractor. BGP owns a 51% equity interest in INOVA Geophysical, and we own the remaining 49% interest. INOVA manufactures cable-based, cableless and radio-controlled seismic data acquisition systems, digital sensors, vibroseis vehicles (i.e., vibrator trucks) and source controllers for detonator and energy sources business lines.

Economic Conditions

Demand for our seismic data acquisition services and products has traditionally been cyclical and substantially dependent upon activity levels in the oil and gas industry, particularly our customers’ willingness and ability to expend their capital for oil and natural gas exploration and development projects. This demand is sensitive to current and expected future crude oil and natural gas prices. In the first quarter of 2014, West Texas Intermediate (“WTI”) spot crude oil prices remained in a range of approximately $91 to $105 per barrel, finishing the quarter near $102 per barrel. Brent crude oil prices remained in a range of approximately $106 to $112 per barrel, finishing the quarter near $106 per barrel.

Energy price forecasts are, by their nature, highly uncertain, but external reports forecast that WTI crude oil prices and Brent crude oil prices are expected to remain in price ranges of $80 to $110 and $105 to $130 per barrel, respectively, for 2014.

U.S. Henry Hub natural gas prices traded in a range of $4.00 to $6.50 per MMBtu, finishing the quarter near $4.50 per MMBtu. We believe demand for natural gas will continue to grow because it is increasingly being used to supplant coal as the preferred fuel for the generation of U.S. electric power.

Our business has traditionally been seasonal, with the strongest demand for our services and products often in the fourth quarter of our fiscal year. Recently, we have seen reduced levels of exploration-related spending by E&P companies, which are reportedly focusing more of their current spending towards production optimization of existing assets.

For the first quarter of 2014, our Solutions segment revenues remained flat compared to the revenues recorded for the first quarter of 2013. During the first quarter of 2014, data processing and data library revenues increased while new venture revenues decreased. Data processing revenues for the first quarter of 2014, which increased 38%, were positively impacted by approximately $15.0 million of revenues tied to a customer contract executed in the first quarter for work performed in 2013. Our data library sales, which increased 40%, were positively impacted by sales in Africa and Australia. Our new venture revenues decreased 32%, as the first quarter 2013 included revenues from a large proprietary 3D marine program offshore Morocco. Our Solutions gross margins increased during the first quarter of 2014 principally due to the recognition of approximately $15.0 million of revenues tied to the customer contract executed in the first quarter of 2014 while the related costs were recognized in 2013, and from higher margins on our new ventures programs.

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At March 31, 2014, our Solutions segment backlog, which consists of commitments for (i) data processing work and (ii) both multi-client new venture projects and proprietary projects by our GeoVentures group underwritten by our customers, was $69.2 million, compared with backlog of $84.4 million at December 31, 2013 and $129.1 million at March 31, 2013. The decline in backlog during the first quarter of 2014 was primarily due to completion of some large new ventures projects. We anticipate that the majority of our backlog will be recognized as revenue over the remainder of 2014.

Our Software segment revenues increased for the first quarter of 2014 (a record first quarter for us) compared to the same period of 2013, primarily impacted by an increase in Orca and Gator sales in the first quarter of 2014.

Revenues for our Systems segment decreased primarily because we recorded no revenues from ocean-bottom systems in the first quarter of 2014. These declines were partially offset by an increase in repair and replacement marine positioning equipment revenues

In January 2014, we increased our ownership in OceanGeo, our joint venture for ocean-bottom seismic acquisition services, from 30% to 70%. Our first quarter 2014 results include the consolidated revenues of OceanGeo for February and March. During those two months, OceanGeo recognized $20.6 million of revenues for the work performed on its five-month project in Trinidad. Prior to February, we accounted for our interest in OceanGeo as an equity method investment. For information regarding our acquisition of OceanGeo, see Note 2 “Acquisition of Controlling Interest in OceanGeo” of Notes to Unaudited Condensed Consolidated Financial Statements.

INOVA Geophysical reported a decrease of 33% in revenues for the three-month period ending December 31, 2013, compared to the same three-month period ending December 31, 2012. This decrease in revenues was principally due to a significant drop in vehicle sales, partially offset by an increase in rental revenues in North America and Russia.

It is our view that technologies that add a competitive advantage through improved imaging, cost reductions or improvements in well productivity will continue to be valued in our marketplace. We believe that our newest technologies, such as Calypso, our next-generation VSO ocean-bottom cable system, WiBand broadband data processing technology, Orca and Narwhal and INOVA Geophysical’s newest technologies, will continue to attract customer interest, because those technologies are designed to deliver improvements in image quality within more productive delivery systems.

We remain confident that, despite current marketplace issues that we describe above, the long-term growth in demand for seismic services worldwide will continue.

Key Financial Metrics

The table below provides an overview of key financial metrics for our company as a whole and our four business segments for the three months ended March 31, 2014, compared to the same period of 2013. For certain tabular information on the operating results of our INOVA Geophysical joint venture, see “— Other Items — Equity in Earnings (Losses) of Investments.”

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	Three Months Ended March 31,
	2014			2013
Net revenues:
Solutions:
New Venture	$	32,738		$	48,436
Data Library	13,217			9,448
Total multi-client revenues	45,955			57,884
Data Processing	43,286			31,286
Total	$	89,241		$	89,170
Systems:
Towed Streamer	$	11,851		$	13,549
Ocean Bottom Equipment	—			6,765
Other	12,997			11,533
Total	$	24,848		$	31,847
Software:
Software Systems	$	9,154		$	7,941
Services	885			779
Total	$	10,039		$	8,720
Ocean Bottom Services	$	20,570		$	—
Total	$	144,698		$	129,737
Gross profit:
Solutions	$	33,011		$	20,197
Systems	11,417			8,380
Software	7,257			6,380
Ocean Bottom Services	5,169			—
Total	$	56,854		$	34,957
Gross margin:
Solutions	37		%	23		%
Systems	46		%	26		%
Software	72		%	73		%
Ocean Bottom Services	25		%	—		%
Total	39		%	27		%
Income from operations:
Solutions	$	19,112		$	7,357
Systems	3,371			934
Software	5,128			5,161
Ocean Bottom Services	4,162			—
Corporate and other	(12,102		)	(11,529		)
Total	$	19,671		$	1,923
Operating margin:
Solutions	21		%	8		%
Systems	14		%	3		%
Software	51		%	59		%
Ocean Bottom Services	20		%	—		%
Corporate and other	(8		)%	(9		)%
Total	14		%	1		%

We intend that the following discussion of our financial condition and results of operations will provide information that will assist in understanding our consolidated financial statements, the changes in certain key items in those financial statements from period to period, and the primary factors that accounted for those changes.

On March 28, 2014, we filed on Form 10-K/A, an Amendment No. 1 to our Annual Report on Form 10-K in order to file certain separate consolidated financial statements for INOVA Geophysical, as required under Securities and Exchange Commission (“SEC”) Regulation S-X.

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For a discussion of factors that could impact our future operating results and financial condition, see (i) Item 1A. “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2013, and (ii) Item 1A. “Risk Factors” in Part II of this Form 10-Q.

Results of Operations

Three Months Ended March 31, 2014 Compared to Three Months Ended March 31, 2013

Our overall total net revenues of $144.7 million for the three months ended March 31, 2014 (the “Current Quarter”) increased$15.0 million, or 12%, compared to total net revenues for the three months ended March 31, 2013 (the “Comparable Quarter”). Our overall gross profit percentage for the Current Quarter was 39%, compared to 27% for the Comparable Quarter. For the Current Quarter, our income from operations was $19.7 million, compared to $1.9 million for the Comparable Quarter. Net income for the Current Quarter was $76.0 million, or $0.46 per diluted share, compared to net income of $1.5 million, or $0.01 per diluted share, for the Comparable Quarter. The Current Quarter included a reduction of the accrual for loss contingency related to legal proceedings of $69.6 million, impacting our diluted earnings per share by $0.42. Excluding this reduction of accrual, our net income for the Current Quarter was $6.4 million, or $0.04 per diluted share, as adjusted.

Net Revenues, Gross Profits and Gross Margins

Solutions — Net revenues for the Current Quarter remained flat at $89.2 million, compared to the Comparable Quarter. The components of revenue changed including (i) lower new venture revenues, primarily from a large proprietary 3D marine program in the Comparable Quarter, partially offset by increased revenues in North America and Latin America; offset by (ii) higher data library sales primarily in Africa and Australia; and (iii) an increase in data processing sales due to the signing of a significant customer contract in the Current Quarter that included $15.0 million of work completed in 2013. Gross profitincreased by $12.8 million to $33.0 million, representing a 37% gross margin, compared to $20.2 million, which represented a 23% gross margin, in the Comparable Quarter. The increase in gross margin was due primarily to (i) the recognition of revenue related to the signing of a significant customer contract in the Current Quarter, while the costs associated with the work on that contract were recognized in 2013; and (ii) higher margins on our new venture programs in the Current Quarter.

Systems — Net revenues for the Current Quarter decreased by $7.0 million, or 22%, to $24.8 million, compared to $31.8 million for the Comparable Quarter. Gross profitincreased by $3.0 million to $11.4 million, representing a 46% gross margin, for the Current Quarter, compared to $8.4 million, representing a 26% gross margin, for the Comparable Quarter. The decline in revenues was principally due to (i) no sales of Ocean Bottom Equipment in the Current Quarter; partially offset by (ii) additional repair work in the Current Quarter versus the Comparable Quarter. Gross profits increased primarily due to cost savings from the restructuring in 2013.

Software — Net revenues for the Current Quarter increased$1.3 million, or 15%, to $10.0 million, compared to $8.7 million for the Comparable Quarter. Gross profit for the Current Quarter increased$0.9 million to $7.3 million, representing a 72% gross margin, compared to $6.4 million, representing a 73% gross margin, for the Comparable Quarter. The increase in revenues was due to an increase in Orca and Gator sales occurring in the Current Quarter.

Ocean Bottom Services — Net revenues for the Current Quarter were $20.6 million and gross profit was $5.2 million, representing a 25% gross margin. During the Current Quarter, we established a new operating segment through the acquisition of a controlling ownership interest in OceanGeo. In late January, we began consolidating OceanGeo, therefore revenues only reflect activity from February and March 2014.

Operating Expenses

Research, Development and Engineering — Research, development and engineering expense was $9.0 million, or 6% of net revenues, for the Current Quarter, a decrease of $0.3 million compared to $9.3 million, or 7% of net revenues, for the Comparable Quarter.

Marketing and Sales — Marketing and sales expense was $9.2 million, or 6% of net revenues, for the Current Quarter, an increase of $1.2 million compared to $8.0 million, or 6% of net revenues, for the Comparable Quarter. The increase was primarily due to higher commissions and employment-related costs to support the continued growth in our Solutions segment.

General, Administrative and Other Operating Expenses — General, administrative and other operating expenses of $18.9 million, or 13% of net revenues, for the Current Quarter, represented an increase of $3.1 million compared to $15.8 million, or 12% of net revenues, for the Comparable Quarter. This increase was primarily related to the consolidation of general, administrative and other operating expenses incurred at OceanGeo. General, administrative and other operating expenses for both the Current Quarter and the Comparable Quarter include approximately $3 million of bad debt expense related to customer bankruptcies.

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Other Items

Interest Expense, net — Interest expense, net, was $4.8 million for the Current Quarter compared to $1.1 million for the Comparable Quarter. This increase is related to the issuance of our 8.125% Senior Secured Second-Priority Notes due 2018 (the “Notes”) in May 2013. These Notes carry a higher interest rate than the rate under our revolving line of credit indebtedness, resulting in an increase in interest expense during the Current Quarter (see “— Liquidity and Capital Resources — Sources of Capital” below).

Equity in Earnings (Losses) of Investments — We account for our investment in INOVA Geophysical as an equity method investment. We record our share of earnings and losses of our 49% interest in INOVA Geophysical on a one fiscal quarter lag basis. Thus, our share of INOVA Geophysical’s earnings for the three months ended December 31, 2013 is included in our financial results for the Current Quarter. For the Current Quarter, we recorded our equity share of INOVA Geophysical’s losses of approximately $2.4 million, compared to the $1.9 million equity share in earnings we recorded for the Comparable Quarter.

For the period of January 1 to January 26, 2014, we accounted for our equity interest in OceanGeo as an equity method investment. For that period, our share of OceanGeo’s earnings was $0.7 million. Subsequent to the acquisition of a controlling interest on January 27, 2014, OceanGeo’s results of operations are consolidated into our results of operations. For additional information about the acquisition of OceanGeo, see Note 2 “Acquisition of Controlling Interest in OceanGeo”of Notes to Unaudited Condensed Consolidated Financial Statements.

The following table reflects the summarized financial information for INOVA Geophysical for the three months ended December 31, 2013 and 2012 (in thousands):

	Three Months Ended December 31,
	2013			2012
Net revenues	$	40,176		$	59,611
Gross profit	$	4,948		$	12,327
Loss from operations	$	(3,667	)	$	(250	)
Net income (loss)	$	(4,951	)	$	3,742

Other Income, net — Other income, net, for the Current Quarter was $68.5 million compared to other income, net, of $1.0 million for the Comparable Quarter. This difference was primarily related to the reduction of the accrual for loss contingency related to the WesternGeco legal proceedings by $69.6 million in the Current Quarter.

The following table reflects the significant items of other income, net as follows (in thousands):

	Three Months Ended March 31,
	2014			2013
Reduction of accrual for loss contingency related to legal proceedings (Note 8)	$	69,557		$	—
Other income (expense), net	(1,031		)	1,027
Total other income, net	$	68,526		$	1,027

Income Tax Expense — Income tax expense for the Current Quarter was $5.3 million compared to $1.2 million for the Comparable Quarter. Our effective tax rates for the Current Quarter and Comparable Quarter were 6.4% and 40.0%, respectively. Our effective tax rate for the first quarter of 2014 was positively impacted by the change in valuation allowance related to the reduction of the legal contingency reserve offset by the impact of pre-tax losses of OceanGeo within certain jurisdictions for which we could not recognize a tax benefit to offset our tax expenses. Excluding the change in valuation allowance, the Company’s effective tax rate for the Current Quarter was 43.3%. See further discussion of establishment of the deferred tax valuation allowance at Note 7 “Income Taxes”of Notes to Unaudited Condensed Consolidated Financial Statements.

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Liquidity and Capital Resources

Sources of Capital

We had total liquidity of $322.3 million at March 31, 2014, consisting of $197.3 million in cash on hand and $125.0 million of unused and available capacity under our $175.0 million credit facility. Our cash requirements include our working capital requirements and cash required for our debt service payments, multi-client seismic data acquisition activities and capital expenditures. As of March 31, 2014, we had working capital of $218.3 million, which included $197.3 million of cash on hand. Working capital requirements are primarily driven by our continued investment in our multi-client seismic data library ($22.4 million in the Current Quarter) and, to a lesser extent, our inventory purchase obligations. Also, our headcount has traditionally been a significant driver of our working capital needs. Because a significant portion of our business is involved in the planning, processing and interpretation of seismic data services, one of our largest investments is in our employees, which involves cash expenditures for their salaries, bonuses, payroll taxes and related compensation expenses. Our working capital requirements may change from time to time depending upon many factors, including our operating results and adjustments in our operating plan required in response to industry conditions, competition, acquisition opportunities and unexpected events, such as an adverse outcome in our WesternGeco litigation, which is further discussed at Part II, Item 1. “Legal Proceedings.” In recent years, our primary sources of funds have been cash flows generated from our operations, our existing cash balances, debt and equity issuances and borrowings under our revolving credit facilities. We may also incur additional indebtedness in the future.

In January 2014, we exercised our option to increase our ownership interest in OceanGeo from 30% to 70%. This increase in ownership percentage required us to loan OceanGeo additional funds for working capital. For additional information about the acquisition of OceanGeo, see Note 2 “Acquisition of Controlling Interest in OceanGeo.”

Senior Secured Second-Priority Notes — In 2013, we sold $175.0 million aggregate principal amount of 8.125% Senior Secured Second-Priority Notes due 2018 in a private offering. The Notes are senior secured second-priority obligations, are guaranteed by our material U.S. subsidiaries (“the Notes Guarantors”), and mature on May 15, 2018. Interest on the Notes accrues at the rate of 8.125% per annum and is payable semiannually in arrears on May 15 and November 15 of each year during their term.

We used the net proceeds from the offering to repay outstanding indebtedness under our senior secured credit facility, see “— Revolving Line of Credit” below with CMB, and for general corporate purposes. On April 10, 2014, we commenced a registered exchange offer pursuant to which holders of the privately placed Notes that have not been registered under the Securities Act of 1933, as amended (the “Securities Act”), may exchange their Notes for a like principal amount of Notes that have been registered under the Securities Act. Unless extended, the exchange offer will expire at 5:00 p.m., New York City time, on May 9, 2014.

On or after May 15, 2015, we may on one or more occasions redeem all or a part of the Notes at the redemption prices set forth below, plus accrued and unpaid interest and special interest, if any, on the Notes redeemed during the twelve-month period beginning on May 15th of the years indicated below:

Date	Percentage
2015	104.063%
2016	102.031%
2017 and thereafter	100.000%

For additional information regarding the terms of the Notes and related Indenture, Registration Rights Agreement and Intercreditor Agreement, see our Current Report on Form 8-K filed with the SEC on May 13, 2013.

Revolving Line of Credit — On May 29, 2012, we amended the terms of our senior secured credit facility with CMB (the “Credit Facility”). The First Amendment to Credit Agreement and Loan Documents (the “First Amendment”) modified certain provisions of our senior credit agreement with CMB that we had entered into on March 25, 2010. The maturity date of any outstanding debt under the Credit Facility is March 24, 2015, therefore the outstanding balance of $50.0 million has been classified as a current obligation at March 31, 2014. We are currently considering multiple options to maintain a revolving line of credit.

As amended by the First Amendment, our Credit Facility provides that we may make revolving credit borrowings in U.S. Dollars, Euros, British Pounds Sterling or Canadian Dollars up to an amount not to exceed the U.S. Dollar equivalent of $175.0 million. For further information regarding our Credit Facility, see Note 5 “Long-term Debt” of Notes to Unaudited Condensed Consolidated Financial Statements.

In connection with our offering of the Notes, we entered into a consent agreement with CMB as administrative agent and lender under the Credit Facility, in April 2013 that permitted us to, among other things, (i) issue the Notes and related guarantees and (ii) invest a cumulative aggregate amount of up to $100 million in OceanGeo from and after February 26, 2013.

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Meeting our Liquidity Requirements

As of March 31, 2014, our total outstanding indebtedness (including capital lease obligations) was approximately $241.0 million, consisting of approximately $175.0 million outstanding Notes, $50.0 million under our revolving line of credit, $9.1 million of capital leases, $5.6 million of other bank debt and $1.3 million relating to our facility lease obligations.

For the Current Quarter, total capital expenditures, including investments in our multi-client data library, were $24.4 million. We are projecting additional capital expenditures for the remaining three quarters of 2014 to be between $80 million and $100 million. Of the total projected capital expenditures for the remaining nine months of 2014, we are estimating that approximately $70 million to $90 million will be spent on investments in our multi-client data library, but we are anticipating that most of these investments will be underwritten by our customers. To the extent that our customers’ commitments do not reach an acceptable level of pre-funding, the amount of our anticipated investment in these data libraries could be significantly less.

We currently believe that our existing cash, cash generated from operations, our sources of working capital, and our Credit Facility will be sufficient for us to meet our anticipated cash needs for at least the next 12 months. However, certain outcomes with respect to the ongoing WesternGeco litigation could have a material adverse effect on our liquidity.

Loss Contingency — WesternGeco Lawsuit

As of March 31, 2014, we have a loss contingency of $123.8 million accrued related to the legal proceedings with WesternGeco. As described at Part II, Item 1. “Legal Proceedings,” there are possible scenarios involving a judgment in the WesternGeco lawsuit that could adversely affect our liquidity. In order to appeal the judgment, we will be required to post an appeal bond in the amount of $120.0 million. We have arranged with sureties to post an appeal bond on our behalf. The terms of the appeal bond arrangements provide the sureties the contractual right for as long as the bond is outstanding to require us to post cash collateral for up to the full amount of the bond; however, the sureties have informed us that they will not require cash collateral upon the posting of the appeal bond. Until an appeal bond is posted, the terms applicable to the appeal bond, including collateral required to secure the bond, are not final. If the sureties exercise their right to require collateral while the appeal bond is outstanding, we would intend to utilize a combination of cash on hand and undrawn balances available under our revolving line of credit. If we are required to collateralize the full amount of the bond, we might also seek additional debt and/or equity financing. The collateralization of the full amount of the bond could have an adverse effect on our liquidity. Any requirements that we collateralize the appeal bond will reduce our liquidity and may reduce the borrowings otherwise available under our Credit Facility. The current maturity date of any outstanding debt under our Credit Facility is March 2015. No assurances can be made whether our efforts to raise additional cash would be successful and, if so, on what terms and conditions, and at what cost we might be able to secure any such financing. If additional funds are raised through the issuance of debt and/or equity securities, these securities could have rights, preferences and privileges more favorable to those than our current debt or equity securities, and the terms of these securities could impose further restrictions on our operations. If we are unable to raise additional capital under these circumstances, our business, operating results and financial condition may be materially harmed.

If we are unable to post the appeal bond, we may be unable to stay enforcement of the judgment during the appeal of the case. At this time, we are unable to predict the timing of posting the required appeal bond.

If our efforts on appeal to reverse or reduce the verdict substantially are unsuccessful, it would likely have the effect of reducing our capital resources available to fund our operations and take advantage of certain business opportunities, which could have a material adverse effect on our business, results of operations and financial condition.

We may not ultimately prevail in the appeals process and we could be required to pay damages up to the amount of the loss contingency accrual plus any additional amount ordered by the court. Our assessment of our potential loss contingency may change in the future due to developments at the trial court or appellate court and other events, such as changes in applicable law, and such reassessment could lead to the determination that no loss contingency is probable or that a greater loss contingency is probable, which could have a material effect on our business, financial condition and results of operations. Amounts of estimated loss contingency accruals as disclosed in this Quarterly Report on Form 10-Q or elsewhere are based on currently available information and involve elements of judgment and significant uncertainties. Actual losses may exceed or be considerably less than these accrual amounts.

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Cash Flow from Operating Activities

Net cash provided by operating activities was $62.7 million for the Current Quarter, compared to$49.6 million for the Comparable Quarter. This increase in our net cash flows from operating activities was primarily due to higher income in the Current Quarter compared to the income from operations that was recorded for the Comparable Quarter. Our net cash flows provided by operating activities during the Current Quarter were positively impacted by significant decreases in accounts receivable due to strong collections in the Current Quarter, attributable to strong revenues in the fourth quarter of 2013, and increases in accounts payable, but were negatively impacted by an increase in unbilled receivables, a decrease in deferred revenues and a reduction in accrued expenses.

Cash Flow from Investing Activities

Cash used in investing activities was $25.8 million for the Current Quarter, compared to$43.0 million for the Comparable Quarter. The principal use of cash in our investing activities during the Current Quarter was $22.4 million for continued investment in our multi-client data library, $2.0 million for capital expenditures related to property, plant and equipment, and a net investment in OceanGeo of $3.1 million. Subtracted from these sums was a $1.0 million repayment of monies advanced to INOVA Geophysical during the Current Quarter. The principal uses of cash in our investing activities during the Comparable Quarter were $28.8 million for investment in our multi-client data library, $3.8 million of capital expenditures related to property, plant, equipment and seismic rental equipment, and $9.5 million invested in and advanced to OceanGeo.

Cash Flow from Financing Activities

Net cash provided by financing activities was $12.4 million for the Current Quarter, compared to a use of cash of$0.1 million for the Comparable Quarter. The net cash flow provided by financing activities during the Current Quarter was primarily related to $15.0 million in borrowings under our revolving line of credit, offset by $2.8 million of payments of long-term debt.

Inflation and Seasonality

Inflation in recent years has not had a material effect on our costs of goods or labor, or the prices for our products or services. Traditionally, our business has been seasonal, with strongest demand often occurring in the fourth quarter of our fiscal year.

Critical Accounting Policies and Estimates

Refer to our Annual Report on Form 10-K for the year ended December 31, 2013 for a complete discussion of our significant accounting policies and estimates. There have been no material changes in the Current Quarter regarding our critical accounting policies and estimates. For discussion of recent accounting pronouncements we have adopted, see Note 15 “Recent Accounting Pronouncements” of Notes to Unaudited Condensed Consolidated Financial Statements.

Foreign Sales Risks

The majority of our foreign sales are denominated in United States dollars. Product revenues are allocated to geographical locations on the basis of the ultimate destination of the equipment, if known. If the ultimate destination of such equipment is not known, product revenues are allocated to the geographical location of initial shipment. Service revenues, which primarily relate to our GeoVentures division, are allocated based upon the billing location of the customer. For the Current Quarter and Comparable Quarter, international sales comprised 76% and 79%, respectively, of total net revenues. The percentage of total sales from foreign countries decreased primarily due to growth in sales to a customer in Latin America, offset by decreased sales in North America and Europe.

A summary of net revenues by geographic area follows (in thousands):	Three Months Ended March 31,
	2014		2013
Latin America	$	53,848	$	15,388
North America	34,277		27,379
Europe	23,955		66,807
Middle East	9,733		13,379
Asia Pacific	12,900		3,490
Africa	9,173		2,501
Commonwealth of Independent States (CIS)	812		793
Total	$	144,698	$	129,737

Item 3.Quantitative and Qualitative Disclosures about Market Risk

Refer to Item 7A of our Annual Report on Form 10-K for the year ended December 31, 2013 for a discussion regarding our quantitative and qualitative disclosures about market risk. There have been no material changes to those disclosures during the three months ended March 31, 2014.

Item 4.Controls and Procedures

Disclosure Controls and Procedures. Disclosure controls and procedures are designed to ensure that information required to be disclosed in the reports we file with or submit to the SEC under the Securities Exchange Act of 1934, as amended (the “Exchange Act”) is recorded, processed, summarized and reported within the time period specified by the SEC’s rules and forms. Disclosure controls and procedures are defined in Rule 13a-15(e) under the Exchange Act, and they include, without limitation, controls and procedures designed to ensure that information required to be disclosed under the Exchange Act is accumulated and communicated to management, including the principal executive officer and the principal financial officer, as appropriate, to allow timely decisions regarding required disclosure.

Our management carried out an evaluation of the effectiveness of the design and operation of our disclosure controls and procedures as of March 31, 2014. Based upon that evaluation, our principal executive officer and principal financial officer have concluded that our disclosure controls and procedures were effective as of March 31, 2014.

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Changes in Internal Control over Financial Reporting. There was not any change in our internal control over financial reporting that occurred during the three months ended March 31, 2014, which has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

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PART II — OTHER INFORMATION

Item 1.Legal Proceedings

WesternGeco

In June 2009, WesternGeco L.L.C. (“WesternGeco”) filed a lawsuit against us in the United States District Court for the Southern District of Texas, Houston Division. In the lawsuit, styled WesternGeco L.L.C. v. ION Geophysical Corporation, WesternGeco alleged that we had infringed several method and apparatus claims contained in four of its United States patents regarding marine seismic streamer steering devices. WesternGeco sought unspecified monetary damages and an injunction prohibiting us from making, using, selling, offering for sale or supplying any infringing products in the United States.

In June 2010, WesternGeco filed a lawsuit against various subsidiaries and affiliates of Fugro N.V. (“Fugro”), one of our seismic contractor customers, accusing Fugro of infringing the same United States patents regarding marine seismic streamer steering devices by planning to use certain equipment purchased from us on a survey located outside of U.S. territorial waters. The court approved the consolidation of the Fugro case with the case us. Fugro filed a motion to dismiss the lawsuit, and in March 2011 the presiding judge granted Fugro’s motion to dismiss in part, on the basis that the alleged activities of Fugro would occur more than 12 miles from the U.S. coast and therefore are not actionable under U.S. patent infringement law. In response to a Motion for Summary Judgment filed jointly by us and Fugro, the Court ruled in April 2012 that we did not directly infringe WesternGeco’s method patent claims. In a pre-trial ruling on June 29, 2012, the Court ruled that, if a particular patent claim of WesternGeco was held to be valid and enforceable at the trial, our supplying of our DigiFIN lateral streamer control units and related software from the United States to our customers overseas with an intention for the customers to combine DigiFIN and such related software with other required components of the patent claim, would infringe one claim in one of WesternGeco’s asserted patents, U.S. Patent No. 7,293,520.

The trial began on July 23, 2012. During the trial, Fugro settled all claims asserted against it by WesternGeco and obtained a global license from WesternGeco. A verdict was returned by the jury on August 16, 2012, finding that we willfully infringed the claims contained in the four patents by supplying DigiFIN and the related software from the United States and awarded WesternGeco the sum of $105.9 million in damages, consisting of $12.5 million in reasonable royalty and $93.4 million in lost profits.

In September 2012, we filed motions with the trial court to overturn all or portions of the verdict. In June 2013, the presiding judge entered a Memorandum and Order rejecting the jury’s finding of willfulness and denying WesternGeco’s motions for willfulness and enhanced damages, but also denying our post-verdict motions that challenged the jury’s infringement findings and the damages amount. In the Memorandum and Order, the judge also stated that he would approve WesternGeco’s motion for a permanent injunction and that WesternGeco is entitled to be awarded supplemental damages for the additional DigiFIN units that were supplied from the United States before and after trial that were not included in the jury verdict due to the timing of the trial. On October 24, 2013, the judge entered another Memorandum and Order, ruling on the number of DigiFIN units that are subject to supplemental damages and also ruling that the supplemental damages applicable to the additional units should be calculated by adding together the jury’s previous reasonable royalty and lost profits damages awards per unit, resulting in supplemental damages of $73.1 million. The October 2013 Memorandum and Order also concluded that our infringement involving the supplemental units was not willful and that WesternGeco was not entitled to receive enhanced damages.

On April 30, 2014, the judge entered another Order, ruling that lost profits should not have been included in the calculation of supplemental damages in the October 2013 Memorandum and Order and reducing the supplemental damages award in the case from $73.1 million to $9.4 million. In the Order, the judge also further reduced the damages award in the case by $3.0 million to reflect a settlement and license that WesternGeco entered into with a customer of ours that had purchased and used DigiFIN units that were also included in the damages amounts awarded against us. After accounting for the above court-ordered reductions, the total damages award in the case now consists of approximately $123.8 million, consisting of adjusted jury verdict and supplemental damages, court costs and estimates of prejudgment interest.

We intend to appeal the final judgment to the United States Court of Appeals for the Federal Circuit. WesternGeco would also have the right to elect to appeal the final judgment.

The trial court has ruled that it will also enter a permanent injunction against us. As of the filing date of this Quarterly Report on Form 10-Q, the Court had not issued the definitive terms of the permanent injunction. Until the permanent injunction is entered, the terms of the injunction cannot be known for certain, but it is likely that the permanent injunction will prohibit us from supplying our DigiFIN units, two parts that are unique to the DigiFIN product and related software from the United States to our customers overseas with an intention for the customers to combine DigiFIN and the software with other required components of the patent claims. We have reorganized our operations such that we no longer supply DigiFIN units, the unique DigiFIN parts and the related software from the United States.

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Based on our analysis after the trial court’s Memorandum and Order in June 2013 denying our post-verdict motions that challenged the jury’s infringement findings and the damages amount, we increased our loss contingency accrual related to this case from $10.0 million to $120.0 million, consisting of jury verdict damages, court costs, and estimates of prejudgment interest and supplemental damages. Based on our analysis after the trial court’s Memorandum and Order in October 2013 awarding supplemental damages, we further increased our loss contingency accrual related to this case from $120.0 million, to $123.8 million at December 31, 2013, consisting of jury verdict damages, supplemental damages, court costs, and estimates of prejudgment interest. As a result of the Order entered in April 2014, we reversed our prior loss contingency accrual by approximately $70.0 million, resulting in a loss contingency accrual of $123.8 million at March 31, 2014. Additional interest will continue to accrue until this legal matter is fully resolved.

Our assessment of our potential loss contingency may change in the future due to developments at the trial court or appellate court and other events, such as changes in applicable law, and such reassessment could lead to the determination that no loss contingency is probable or that a greater or lesser loss contingency is probable. Any such reassessment could have a material effect on our financial condition or results of operations.

As stated above, we intend to appeal the trial court judgment to the United States Court of Appeals for the Federal Circuit. In order to stay the judgment during the appeal, we will be required to post an appeal bond with the trial court. The amount of the appeal bond is in the discretion of the trial court judge and could be required to be up to the full amount of damages entered in the judgment, plus court costs and interest; however, in the Order entered in April 2014, the judge agreed that the appeal bond amount required to be posted by us will be $120.0 million. We have arranged with sureties to post an appeal bond on our behalf. The terms of the appeal bond arrangements provide the sureties the contractual right for as long as the bond is outstanding to require us to post cash collateral for up to the full amount of the bond; however, as a result of the reduced damages amount, the sureties have informed us that they will not require cash collateral upon the posting of the appeal bond. Until an appeal bond is posted, the terms applicable to the appeal bond, including collateral required to secure the bond, are not final.

If the sureties exercise their right to require collateral while the appeal bond is outstanding, we would intend to utilize a combination of cash on hand and undrawn balances available under our revolving line of credit. If we are required to collateralize the full amount of the bond, we might also seek additional debt and/or equity financing. The collateralization of the full amount of the bond could have an adverse effect on our liquidity. Any requirements that we collateralize the appeal bond will reduce our liquidity and may reduce the borrowings otherwise available under our Credit Facility. The current maturity date of any outstanding debt under our Credit Facility is March 2015. No assurances can be made whether our efforts to raise additional cash would be successful and, if so, on what terms and conditions, and at what cost we might be able to secure any such financing.

If we are unable to post the appeal bond, we will be unable to stay enforcement of the trial court judgment during the appeal of the judgment. We are unable to predict the timing of the posting of the required appeal bond. For additional discussion about our liquidity related to posting an appeal bond, see Item 2. “Management’s Discussion and Analysis — Liquidity and Capital Resources — Loss Contingency” in Part I of this Form 10-Q.

Other Litigation

We have been named in various other lawsuits or threatened actions that are incidental to our ordinary business. Litigation is inherently unpredictable. Any claims against us, whether meritorious or not, could be time-consuming, cause us to incur costs and expenses, require significant amounts of management time and result in the diversion of significant operational resources. The results of these lawsuits and actions cannot be predicted with certainty. We currently believe that the ultimate resolution of these matters will not have a material adverse effect on our financial condition or results of operations.

Item 1A.Risk Factors

This report contains or incorporates by reference statements concerning our future results and performance and other matters that are “forward-looking” statements within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act. These statements involve known and unknown risks, uncertainties, and other factors that may cause our or our industry’s results, levels of activity, performance, or achievements to be materially different from any future results, levels of activity, performance, or achievements expressed or implied by such forward-looking statements. In some cases, you can identify forward-looking statements by terminology such as “may,” “will,” “would,” “should,” “intend,” “expect,” “plan,” “anticipate,” “believe,” “estimate,” “predict,” “potential,” or “continue” or the negative of such terms or other comparable terminology. Examples of other forward-looking statements contained or incorporated by reference in this report include statements regarding:

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• the expected outcome of the WesternGeco litigation and future potential adverse effects on our liquidity in the event that we must post and collateralize an appeal bond for the full amount of damages entered in a judgment or are unsuccessful in our appeal of an adverse judgment in this matter;

• predictions of future industry-wide increases or decreases in capital expenditures for seismic activities;

• the timing of anticipated revenues and the recognition of those revenues for financial accounting purposes;

• future levels of spending by our customers;

• the effects of current and future unrest in the Middle East, North Africa and other regions;

• the effects of current and future worldwide economic conditions (particularly in developing countries) and demand for oil and natural gas and seismic equipment and services;

• the effects of ongoing and future industry consolidation, including, in particular, the effects of consolidation and vertical integration in the towed marine seismic streamers market;

• future oil and gas commodity prices;

• the timing of future revenue realization of anticipated orders for multi-client seismic survey projects and data processing work in our Solutions segment;

• future levels of our capital expenditures;

• future government regulations, particularly in the Gulf of Mexico;

• expected net revenues, income from operations and net income;

• expected gross margins for our products and services;

• future benefits to be derived from our INOVA Geophysical and OceanGeo joint ventures;

• future seismic industry fundamentals, including future demand for seismic services and equipment;

• future benefits to our customers to be derived from new products and services;

• future benefits to be derived from our investments in technologies, joint ventures and acquired companies;

• future growth rates for our products and services;

• the degree and rate of future market acceptance of our new products and services;

• expectations regarding E&P companies and seismic contractor end-users purchasing our more technologically-advanced products and services;

• anticipated timing and success of commercialization and capabilities of products and services under development and start-up costs associated with their development;

• future cash needs and future availability of cash to fund our operations and pay our obligations;

• potential future acquisitions;

• future opportunities for new products and projected research and development expenses;

• expected continued compliance with our debt financial covenants;

• expectations regarding realization of deferred tax assets; and

• anticipated results with respect to certain estimates we make for financial accounting purposes.

These forward-looking statements reflect our best judgment about future events and trends based on the information currently available to us. Our results of operations can be affected by inaccurate assumptions we make or by risks and uncertainties known or unknown to us. Therefore, we cannot guarantee the accuracy of the forward-looking statements. Actual events and results of operations may vary materially from our current expectations and assumptions.

Information regarding factors that may cause actual results to vary from our expectations, referred to as “risk factors,” appears in our Annual Report on Form 10-K for the year ended December 31, 2013 in Part I, Item 1A. “Risk Factors,” as previously filed with the SEC. There have been no material changes from the risk factors previously disclosed in such Form 10-K.

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Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

(c) During the three months ended March 31, 2014, in connection with the vesting of (or lapse of restrictions on) shares of our restricted stock held by certain employees, we acquired shares of our common stock in satisfaction of tax withholding obligations that were incurred on the vesting date. The date of acquisition, number of shares and average effective acquisition price per share were as follows:

Period	(a) Total Number of Shares Acquired	(b) Average Price Paid Per Share		(c) Total Number of Shares Purchased as Part of Publicly Announced Plans or Program	(d) Maximum Number (or Approximate Dollar Value) of Shares That May Yet Be Purchased Under the Plans or Program
January 1, 2014 to January 31, 2014	—	$	—	Not applicable	Not applicable
February 1, 2014 to February 28, 2014	—	$	—	Not applicable	Not applicable
March 1, 2014 to March 31, 2014	27,669	$	4.07	Not applicable	Not applicable
Total	27,669	$	4.07

Item 5. Other Information

None.

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Item 6.Exhibits

31.1	Certification of Chief Executive Officer Pursuant to Rule 13a-14(a).
31.2	Certification of Chief Financial Officer Pursuant to Rule 13a-14(a).
32.1	Certification of Chief Executive Officer Pursuant to 18 U.S.C. §1350.
32.2	Certification of Chief Financial Officer Pursuant to 18 U.S.C. §1350.
101	The following materials are formatted in Extensible Business Reporting Language (XBRL):(i) Condensed Consolidated Balance Sheets as of March 31, 2014 and December 31, 2013, (ii) Condensed Consolidated Statements of Operations for the three-months ended March 31, 2014 and 2013, (iii) Condensed Consolidated Statements of Comprehensive Income (Loss) for the three-months ended March 31, 2014 and 2013, (iv) Condensed Consolidated Statements of Cash Flows for the three-months ended March 31, 2014 and 2013, (v) Notes to Unaudited Condensed Consolidated Financial Statements.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

ION GEOPHYSICAL CORPORATION
By	/s/ Gregory J. Heinlein
	Gregory J. Heinlein
	Senior Vice President and Chief Financial Officer

Date: May 1, 2014

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EXHIBIT INDEX

Exhibit No.	Description
31.1	Certification of Chief Executive Officer Pursuant to Rule 13a-14(a).
31.2	Certification of Chief Financial Officer Pursuant to Rule 13a-14(a).
32.1	Certification of Chief Executive Officer Pursuant to 18 U.S.C. §1350.
32.2	Certification of Chief Financial Officer Pursuant to 18 U.S.C. §1350.
101	The following materials are formatted in Extensible Business Reporting Language (XBRL):(i) Condensed Consolidated Balance Sheets as of March 31, 2014 and December 31, 2013, (ii) Condensed Consolidated Statements of Operations for the three-months ended March 31, 2014 and 2013, (iii) Condensed Consolidated Statements of Comprehensive Income (Loss) for the three-months ended March 31, 2014 and 2013, (iv) Condensed Consolidated Statements of Cash Flows for the three-months ended March 31, 2014 and 2013, (v) Notes to Unaudited Condensed Consolidated Financial Statements.

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EX-31.1

EXHIBIT 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

PURSUANT TO RULE 13a-14(a) OR RULE 15d-14(a)

I, R. Brian Hanson, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q for the period ended March 31, 2014, of ION Geophysical Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 1, 2014	/s/ R. Brian Hanson
	R. Brian Hanson
	President and Chief Executive Officer

EX-31.2

EXHIBIT 31.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

PURSUANT TO RULE 13a-14(a) OR RULE 15d-14(a)

I, Gregory J. Heinlein, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q for the period ended March 31, 2014, of ION Geophysical Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 1, 2014	/s/ Gregory J. Heinlein
	Gregory J. Heinlein
	Senior Vice President and Chief Financial Officer

EX-32.1

EXHIBIT 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

PURSUANT TO 18 U.S.C. §1350

In connection with the Quarterly Report of ION Geophysical Corporation (the “Company”) on Form 10-Q for the period ended March 31, 2014, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, R. Brian Hanson, President and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to my knowledge that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: May 1, 2014	/s/ R. Brian Hanson
	R. Brian Hanson
	President and Chief Executive Officer

EX-32.2

EXHIBIT 32.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

PURSUANT TO 18 U.S.C. §1350

In connection with the Quarterly Report of ION Geophysical Corporation (the “Company”) on Form 10-Q for the period ended March 31, 2014, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Gregory J. Heinlein, Senior Vice President and Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to my knowledge, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: May 1, 2014	/s/ Gregory J. Heinlein
	Gregory J. Heinlein
	Senior Vice President and Chief Financial Officer

XML

Equity Method Investments Narrative (Details) (USD $)	3 Months Ended					3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 OceanGeo [Member]	Jan. 31, 2014 OceanGeo [Member]	Dec. 31, 2013 OceanGeo [Member]	Mar. 31, 2014 INOVA Geophysical [Member]	Mar. 31, 2013 INOVA Geophysical [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of equity method investment						49.00%
Working capital loan to investee				$ 3,700,000	$ 15,300,000
Equity in earnings (losses) of investments	$ (1,688,000)	$ 1,116,000	$ 738,000			$ (2,426,000)	$ 1,900,000

XML

Condensed Consolidating Financial Information - Narrative (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Senior Notes [Member]	Dec. 31, 2013 Senior Notes [Member]	May 13, 2013 China Merchants Bank Co. (CMB) [Member] Senior Notes [Member]
Condensed Financial Statements, Captions [Line Items]
Principal amount of debt					$ 175,000,000
Carrying value of long-term debt and lease obligations	$ 241,013,000	$ 220,152,000	$ 175,000,000	$ 175,000,000
Stated rate on debt					8.125%

XML

Details of Selected Balance Sheet Accounts Inventories (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Raw materials and subassemblies	$ 56,252	$ 54,168
Work-in-process	2,428	2,297
Finished goods	27,285	33,263
Reserve for excess and obsolete inventories	(31,256)	(32,555)
Total	$ 54,709	$ 57,173

XML

Condensed Consolidating Financial Information - Condensed Balance Sheet (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 197,306	$ 148,056	$ 66,575	$ 60,971
Accounts receivable, net	98,231	149,448
Unbilled receivables	68,452	49,468
Inventories	54,709	57,173
Prepaid expenses and other current assets	25,605	24,772
Total current assets	444,303	428,917
Deferred income tax asset	14,339	14,650
Property, plant, equipment and seismic rental equipment, net	59,811	46,684
Multi-client data library, net	243,083	238,784
Equity method investments	47,466	53,865
Investment in subsidiaries	0	0
Goodwill	56,111	55,876
Intangible assets, net	10,566	11,247
Intercompany receivables	0	0
Other assets	15,640	14,648
Total assets	891,319	864,671
Current liabilities:
Current maturities of long-term debt	60,551	5,906
Accounts payable	38,654	22,654
Accrued expenses	72,471	84,358
Accrued multi-client data library royalties	38,263	46,460
Deferred revenue	16,030	20,682
Total current liabilities	225,969	180,060
Long-term debt, net of current maturities	180,462	214,246
Intercompany payables	0	0
Other long-term liabilities	142,987	210,602
Total liabilities	549,418	604,908
Redeemable noncontrolling interests	5,552	1,878
Stockholders’ equity:
Common stock	1,640	1,637
Additional paid-in capital	882,892	879,969
Accumulated earnings (deficit)	(530,178)	(606,157)
Accumulated other comprehensive income (loss)	(11,799)	(11,138)
Due from ION Geophysical Corporation	0	0
Treasury stock	(6,565)	(6,565)
Total stockholders' equity	335,990	257,746
Noncontrolling interests	359	139
Total equity	336,349	257,885
Total liabilities and equity	891,319	864,671
Reportable Legal Entities [Member] | ION Geophysical Corporation [Member]
Current assets:
Cash and cash equivalents	154,845	124,701	12,554	30,343
Accounts receivable, net	2,532	1,874
Unbilled receivables	0	0
Inventories	0	0
Prepaid expenses and other current assets	12,087	12,888
Total current assets	169,464	139,463
Deferred income tax asset	6,500	6,513
Property, plant, equipment and seismic rental equipment, net	6,152	6,440
Multi-client data library, net	0	0
Equity method investments	47,466	51,065
Investment in subsidiaries	785,917	699,695
Goodwill	0	0
Intangible assets, net	0	0
Intercompany receivables	50,557	8,313
Other assets	13,845	14,315
Total assets	1,079,901	925,804
Current liabilities:
Current maturities of long-term debt	50,000	0
Accounts payable	2,001	3,515
Accrued expenses	15,888	16,652
Accrued multi-client data library royalties	0	0
Deferred revenue	0	0
Total current liabilities	67,889	20,167
Long-term debt, net of current maturities	175,000	210,000
Intercompany payables	467,223	426,134
Other long-term liabilities	33,957	11,757
Total liabilities	744,069	668,058
Redeemable noncontrolling interests	0	0
Stockholders’ equity:
Common stock	1,640	1,637
Additional paid-in capital	882,892	879,969
Accumulated earnings (deficit)	(530,178)	(606,157)
Accumulated other comprehensive income (loss)	(11,799)	(11,138)
Due from ION Geophysical Corporation	0	0
Treasury stock	(6,565)	(6,565)
Total stockholders' equity	335,990	257,746
Noncontrolling interests	(158)	0
Total equity	335,832	257,746
Total liabilities and equity	1,079,901	925,804
Reportable Legal Entities [Member] | The Guarantors [Member]
Current assets:
Cash and cash equivalents	1,539	0	0	0
Accounts receivable, net	46,308	99,547
Unbilled receivables	55,168	33,490
Inventories	5,658	6,595
Prepaid expenses and other current assets	4,897	5,030
Total current assets	113,570	144,662
Deferred income tax asset	6,675	6,960
Property, plant, equipment and seismic rental equipment, net	29,977	29,845
Multi-client data library, net	213,272	212,572
Equity method investments	0	0
Investment in subsidiaries	256,637	248,482
Goodwill	26,984	26,984
Intangible assets, net	7,747	8,246
Intercompany receivables	0	13,419
Other assets	46	56
Total assets	654,908	691,226
Current liabilities:
Current maturities of long-term debt	4,794	4,716
Accounts payable	13,078	11,741
Accrued expenses	41,532	54,250
Accrued multi-client data library royalties	37,648	45,921
Deferred revenue	12,689	16,387
Total current liabilities	109,741	133,015
Long-term debt, net of current maturities	4,073	3,655
Intercompany payables	34,145	0
Other long-term liabilities	121,617	214,211
Total liabilities	269,576	350,881
Redeemable noncontrolling interests	0	0
Stockholders’ equity:
Common stock	290,460	290,460
Additional paid-in capital	175,005	180,700
Accumulated earnings (deficit)	324,015	232,186
Accumulated other comprehensive income (loss)	6,217	6,218
Due from ION Geophysical Corporation	(410,365)	(369,219)
Treasury stock	0	0
Total stockholders' equity	385,332	340,345
Noncontrolling interests	0	0
Total equity	385,332	340,345
Total liabilities and equity	654,908	691,226
Reportable Legal Entities [Member] | All Other Subsidiaries [Member]
Current assets:
Cash and cash equivalents	40,922	23,355	54,021	30,628
Accounts receivable, net	49,391	48,027
Unbilled receivables	13,284	15,978
Inventories	49,051	50,578
Prepaid expenses and other current assets	10,391	7,438
Total current assets	163,039	145,376
Deferred income tax asset	758	489
Property, plant, equipment and seismic rental equipment, net	23,682	10,399
Multi-client data library, net	29,811	26,212
Equity method investments	0	2,800
Investment in subsidiaries	0	0
Goodwill	29,127	28,892
Intangible assets, net	2,819	3,001
Intercompany receivables	0	0
Other assets	24,249	24,262
Total assets	273,485	241,431
Current liabilities:
Current maturities of long-term debt	5,757	1,190
Accounts payable	23,575	7,364
Accrued expenses	16,133	13,392
Accrued multi-client data library royalties	615	539
Deferred revenue	3,341	4,295
Total current liabilities	49,421	26,780
Long-term debt, net of current maturities	1,389	591
Intercompany payables	16,412	21,732
Other long-term liabilities	10,195	8,637
Total liabilities	77,417	57,740
Redeemable noncontrolling interests	5,552	1,878
Stockholders’ equity:
Common stock	22,362	19,138
Additional paid-in capital	235,994	235,381
Accumulated earnings (deficit)	(69)	(4,010)
Accumulated other comprehensive income (loss)	(11,430)	(11,920)
Due from ION Geophysical Corporation	(56,858)	(56,915)
Treasury stock	0	0
Total stockholders' equity	189,999	181,674
Noncontrolling interests	517	139
Total equity	190,516	181,813
Total liabilities and equity	273,485	241,431
Consolidation, Eliminations [Member]
Current assets:
Cash and cash equivalents	0	0	0	0
Accounts receivable, net	0	0
Unbilled receivables	0	0
Inventories	0	0
Prepaid expenses and other current assets	(1,770)	(584)
Total current assets	(1,770)	(584)
Deferred income tax asset	406	688
Property, plant, equipment and seismic rental equipment, net	0	0
Multi-client data library, net	0	0
Equity method investments	0	0
Investment in subsidiaries	(1,042,554)	(948,177)
Goodwill	0	0
Intangible assets, net	0	0
Intercompany receivables	(50,557)	(21,732)
Other assets	(22,500)	(23,985)
Total assets	(1,116,975)	(993,790)
Current liabilities:
Current maturities of long-term debt	0	0
Accounts payable	0	34
Accrued expenses	(1,082)	64
Accrued multi-client data library royalties	0	0
Deferred revenue	0	0
Total current liabilities	(1,082)	98
Long-term debt, net of current maturities	0	0
Intercompany payables	(517,780)	(447,866)
Other long-term liabilities	(22,782)	(24,003)
Total liabilities	(541,644)	(471,771)
Redeemable noncontrolling interests	0	0
Stockholders’ equity:
Common stock	(312,822)	(309,598)
Additional paid-in capital	(410,999)	(416,081)
Accumulated earnings (deficit)	(323,946)	(228,176)
Accumulated other comprehensive income (loss)	5,213	5,702
Due from ION Geophysical Corporation	467,223	426,134
Treasury stock	0	0
Total stockholders' equity	(575,331)	(522,019)
Noncontrolling interests	0	0
Total equity	(575,331)	(522,019)
Total liabilities and equity	$ (1,116,975)	$ (993,790)

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Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating Loss Carryforwards [Line Items]
Effective income tax rates	6.40%	40.00%
Effective Income Tax Rate Reconciliation, Percent, Excluding Change In Valuation Allowance	43.30%
Unrecognized tax benefits	$ 2.2
United States Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Net deferred tax asset	$ 3.8

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Basis of Presentation - Details (Details) (OceanGeo [Member])	Jan. 31, 2014
OceanGeo [Member]
Business Acquisition [Line Items]
Increase in ownership percentage	40.00%
Ownership percentage interest	70.00%

XML

Condensed Consolidating Financial Information - Condensed Cash Flow Statement (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net cash provided by operating activities	$ 62,682	$ 49,591
Cash flows from investing activities:
Cash invested in multi-client data library	(22,353)	(28,778)
Purchase of property, plant, equipment and seismic rental equipment	(1,997)	(3,774)
Repayment of advances to INOVA Geophysical	1,000	0
Investment in and advances to OceanGeo B.V.	(3,683)	(9,500)
Cash of OceanGeo B.V. upon acquiring a controlling interest	609	0
Investment in convertible notes	0	(1,000)
Other investing activities	605	76
Net cash used in investing activities	(25,819)	(42,976)
Cash flows from financing activities:
Borrowings under revolving line of credit	15,000	0
Payments on notes payable and long-term debt	(2,755)	(848)
Intercompany lending	0	0
Payment of preferred dividends	0	(338)
Proceeds from employee stock purchases and exercise of stock options	246	716
Other financing activities	(80)	350
Net cash provided by (used in) financing activities	12,411	(120)
Effect of change in foreign currency exchange rates on cash and cash equivalents	(24)	(891)
Net increase (decrease) in cash and cash equivalents	49,250	5,604
Cash and cash equivalents at beginning of period	148,056	60,971
Cash and cash equivalents at end of period	197,306	66,575
Reportable Legal Entities [Member] | ION Geophysical Corporation [Member]
Cash flows from operating activities:
Net cash provided by operating activities	15,105	16,769
Cash flows from investing activities:
Cash invested in multi-client data library	0	0
Purchase of property, plant, equipment and seismic rental equipment	(551)	0
Repayment of advances to INOVA Geophysical	1,000
Investment in and advances to OceanGeo B.V.	0	(8,000)
Cash of OceanGeo B.V. upon acquiring a controlling interest	0
Investment in convertible notes		(1,000)
Other investing activities	579	0
Net cash used in investing activities	1,028	(9,000)
Cash flows from financing activities:
Borrowings under revolving line of credit	15,000
Payments on notes payable and long-term debt	0	0
Intercompany lending	(1,155)	(26,286)
Payment of preferred dividends		(338)
Proceeds from employee stock purchases and exercise of stock options	246	716
Other financing activities	(80)	350
Net cash provided by (used in) financing activities	14,011	(25,558)
Effect of change in foreign currency exchange rates on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	30,144	(17,789)
Cash and cash equivalents at beginning of period	124,701	30,343
Cash and cash equivalents at end of period	154,845	12,554
Reportable Legal Entities [Member] | The Guarantors [Member]
Cash flows from operating activities:
Net cash provided by operating activities	19,989	7,813
Cash flows from investing activities:
Cash invested in multi-client data library	(22,299)	(13,076)
Purchase of property, plant, equipment and seismic rental equipment	(1,230)	(3,774)
Repayment of advances to INOVA Geophysical	0
Investment in and advances to OceanGeo B.V.	0	0
Cash of OceanGeo B.V. upon acquiring a controlling interest	0
Investment in convertible notes		0
Other investing activities	26	0
Net cash used in investing activities	(23,503)	(16,850)
Cash flows from financing activities:
Borrowings under revolving line of credit	0
Payments on notes payable and long-term debt	(1,365)	(597)
Intercompany lending	6,418	9,634
Payment of preferred dividends		0
Proceeds from employee stock purchases and exercise of stock options	0	0
Other financing activities	0	0
Net cash provided by (used in) financing activities	5,053	9,037
Effect of change in foreign currency exchange rates on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	1,539	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	1,539	0
Reportable Legal Entities [Member] | All Other Subsidiaries [Member]
Cash flows from operating activities:
Net cash provided by operating activities	27,588	25,009
Cash flows from investing activities:
Cash invested in multi-client data library	(54)	(15,702)
Purchase of property, plant, equipment and seismic rental equipment	(216)	0
Repayment of advances to INOVA Geophysical	0
Investment in and advances to OceanGeo B.V.	(3,683)	(1,500)
Cash of OceanGeo B.V. upon acquiring a controlling interest	609
Investment in convertible notes		0
Other investing activities	0	76
Net cash used in investing activities	(3,344)	(17,126)
Cash flows from financing activities:
Borrowings under revolving line of credit	0
Payments on notes payable and long-term debt	(1,390)	(251)
Intercompany lending	(5,263)	16,652
Payment of preferred dividends		0
Proceeds from employee stock purchases and exercise of stock options	0	0
Other financing activities	0	0
Net cash provided by (used in) financing activities	(6,653)	16,401
Effect of change in foreign currency exchange rates on cash and cash equivalents	(24)	(891)
Net increase (decrease) in cash and cash equivalents	17,567	23,393
Cash and cash equivalents at beginning of period	23,355	30,628
Cash and cash equivalents at end of period	40,922	54,021
Consolidation, Eliminations [Member]
Cash flows from operating activities:
Net cash provided by operating activities	0	0
Cash flows from investing activities:
Cash invested in multi-client data library	0	0
Purchase of property, plant, equipment and seismic rental equipment	0	0
Repayment of advances to INOVA Geophysical	0
Investment in and advances to OceanGeo B.V.	0	0
Cash of OceanGeo B.V. upon acquiring a controlling interest	0
Investment in convertible notes		0
Other investing activities	0	0
Net cash used in investing activities	0	0
Cash flows from financing activities:
Borrowings under revolving line of credit	0
Payments on notes payable and long-term debt	0	0
Intercompany lending	0	0
Payment of preferred dividends		0
Proceeds from employee stock purchases and exercise of stock options	0	0
Other financing activities	0	0
Net cash provided by (used in) financing activities	0	0
Effect of change in foreign currency exchange rates on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	$ 0	$ 0

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Equity Method Investments (Tables)

3 Months Ended

Mar. 31, 2014

Equity Method Investments and Joint Ventures [Abstract]

Schedule of Change in Equity Method Investments

The following table reflects the change in the Company’s equity method investments during the three months ended March 31, 2014 (in thousands):

	INOVA Geophysical			OceanGeo			Total
Investments at December 31, 2013	$	51,065		$	2,800		$	53,865
Equity in earnings (losses) of investments	(2,426		)	738			(1,688		)
Advances to OceanGeo (prior to consolidation)	—			3,683			3,683
Acquisition of controlling interest (consolidation) of OceanGeo	—			(7,221		)	(7,221		)
Equity interest in investees' other comprehensive loss	(1,173		)	—			(1,173		)
Investment at March 31, 2014	$	47,466		$	—		$	47,466

Equity Method Investments Summarized Financial Information

The following table reflects the summarized financial information for INOVA Geophysical for the three months ended December 31, 2013 and 2012 (in thousands):

	Three Months Ended December 31,
	2013			2012
Net revenues	$	40,176		$	59,611
Gross profit	$	4,948		$	12,327
Loss from operations	$	(3,667	)	$	(250	)
Net income (loss)	$	(4,951	)	$	3,742

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Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	$ (11,138)
Net current-period other comprehensive income (loss)	(661)	(3,656)
Accumulated other comprehensive income (loss), ending balance	(11,799)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	(11,923)
Net current-period other comprehensive income (loss)	486
Accumulated other comprehensive income (loss), ending balance	(11,437)
Equity interest in investees’ other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	841
Net current-period other comprehensive income (loss)	(1,173)
Accumulated other comprehensive income (loss), ending balance	(332)
Other changes in other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	(56)
Net current-period other comprehensive income (loss)	26
Accumulated other comprehensive income (loss), ending balance	$ (30)

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Long-term Debt Narrative (Details) (USD $)										1 Months Ended	3 Months Ended	1 Months Ended	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Senior Notes [Member]	Dec. 31, 2013 Senior Notes [Member]	May 13, 2013 Senior Notes [Member] China Merchants Bank Co. (CMB) [Member]	Mar. 31, 2014 Revolving Credit Facility [Member]	Dec. 31, 2013 Revolving Credit Facility [Member]	Mar. 31, 2014 Brazil Bank Debt [Member]	Dec. 31, 2013 Brazil Bank Debt [Member]	Mar. 31, 2010 Revolving Credit Facility [Member] China Merchants Bank Co. (CMB) [Member]	Mar. 31, 2014 Revolving Credit Facility [Member] China Merchants Bank Co. (CMB) [Member]	Mar. 31, 2010 Revolving Credit Facility [Member] China Merchants Bank Co. (CMB) [Member] Eurodollar Borrowing [Member]	Mar. 31, 2014 Revolving Credit Facility [Member] China Merchants Bank Co. (CMB) [Member] Eurodollar Borrowing [Member]
Debt Instrument [Line Items]
Carrying value of long-term debt and lease obligations	$ 241,013,000	$ 220,152,000	$ 175,000,000	$ 175,000,000		$ 50,000,000	$ 35,000,000	$ 5,649,000	$ 0
Long-term Debt and Interest Rate Caps (Textual) [Abstract]
Principal amount of debt					175,000,000	50,000,000		5,600,000
Stated rate on debt					8.125%
Revolving line of credit, Maximum											175,000,000
Outstanding term loan indebtedness under Credit Facility											$ 50,000,000
Interest rate debt accrued per annum											2.56%
Debt instrument basis spread on variable rate under option one											0.50%	3.50%	2.40%
Debt instrument basis spread on variable rate under option two											1.00%
Debt instrument basis spread on variable rate under option three										2.50%	1.40%
Fixed charge coverage ratio											1.125
Leverage ratio											3.25
Percentage of tangible net worth for covenants compliance										60.00%
Average rate on long-term debt								15.68%

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Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Summary of segment information
Revenues	$ 144,698	$ 129,737
Gross profit (loss)	56,854	34,957
Gross margin	39.00%	27.00%
Income (loss) from operations	19,671	1,923
Interest expense, net	(4,797)	(1,066)
Equity in earnings (losses) of investments	(1,688)	1,116
Other expense, net	68,526	1,027
Income (loss) before income taxes	81,712	3,000
Solutions [Member]
Summary of segment information
Revenues	89,241	89,170
Gross profit (loss)	33,011	20,197
Gross margin	37.00%	23.00%
Income (loss) from operations	19,112	7,357
Systems [Member]
Summary of segment information
Revenues	24,848	31,847
Gross profit (loss)	11,417	8,380
Gross margin	46.00%	26.00%
Income (loss) from operations	3,371	934
Software [Member]
Summary of segment information
Revenues	10,039	8,720
Gross profit (loss)	7,257	6,380
Gross margin	72.00%	73.00%
Income (loss) from operations	5,128	5,161
Ocean Bottom Services Segment [Member]
Summary of segment information
Revenues	20,570	0
Gross profit (loss)	5,169	0
Gross margin	25.00%	0.00%
Income (loss) from operations	4,162	0
Corporate and Other [Member]
Summary of segment information
Income (loss) from operations	(12,102)	(11,529)
New Venture and Data Library [Member] | Solutions [Member]
Summary of segment information
Revenues	45,955	57,884
New Venture [Member] | Solutions [Member]
Summary of segment information
Revenues	32,738	48,436
Data Library [Member] | Solutions [Member]
Summary of segment information
Revenues	13,217	9,448
Data Processing [Member] | Solutions [Member]
Summary of segment information
Revenues	43,286	31,286
Towed Streamer [Member] | Systems [Member]
Summary of segment information
Revenues	11,851	13,549
Ocean Bottom Equipment [Member] | Systems [Member]
Summary of segment information
Revenues	0	6,765
Other [Member] | Systems [Member]
Summary of segment information
Revenues	12,997	11,533
Software Systems [Member] | Software [Member]
Summary of segment information
Revenues	9,154	7,941
Services [Member] | Software [Member]
Summary of segment information
Revenues	$ 885	$ 779

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Fair Value of Financial Instruments Narrative (Details) (USD $)			1 Months Ended		3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2012 Credit Facility Receivable [Member]	Mar. 31, 2014 Credit Facility Receivable [Member]	Mar. 31, 2014 LIBOR Credit Facility Receivable [Member]
Fair Value of Financial Instruments (Additional Textual) [Abstract]
Credit facility to investee			$ 4,000,000
Interest rate on convertible note					0.25%
Amount drawn on credit facility by investee				4,000,000
Note and accrued interest, fair value	4,200,000
Carrying value of long-term debt	241,013,000	220,152,000
Fair value of long-term debt	$ 228,800,000	$ 190,400,000

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Litigation (Details) (WesternGeco [Member], USD $) In Millions, unless otherwise specified	1 Months Ended						1 Months Ended		1 Months Ended		0 Months Ended	1 Months Ended	0 Months Ended
	Mar. 31, 2011 mi	Jun. 30, 2009 Patent	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Aug. 16, 2012 Pending Litigation [Member]	Mar. 31, 2014 Pending Litigation, Post Appeal [Member]	Aug. 16, 2012 Lost Royalties [Member] Pending Litigation [Member]	Aug. 16, 2012 Lost Profits [Member] Pending Litigation [Member]	Oct. 24, 2013 Lost Profits [Member] Settled Litigation [Member]	Apr. 30, 2014 Subsequent Event [Member] Lost Profits [Member] Settled Litigation [Member]	Oct. 24, 2013 Previously Reported [Member] Lost Profits [Member] Settled Litigation [Member]	Oct. 24, 2013 Scenario, Adjustment [Member] Lost Profits [Member] Settled Litigation [Member]
Litigation (Textual) [Abstract]
Number of patent apparatus claims contained		4
Minimum distance from coast to make alleged activities not actionable under patent infringement law	12
Total damages awarded							$ 105.9		$ 12.5	$ 93.4	$ 9.4		$ 73.1	$ (70.0)
Reduction in damages award in the case												(3.0)
Accrual for loss contingency related to legal proceedings			123.8	193.3	120.0	10.0
Maximum amount of appeal bond								$ 120.0

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Segment Information

3 Months Ended

Mar. 31, 2014

Segment Reporting [Abstract]

Segment Information

Segment Information

The Company operates through four business segments – Solutions, Systems, Software and Ocean Bottom Services (the segment name for OceanGeo) – as well as through its INOVA Geophysical joint venture. See Note 4 “Equity Method Investments” for the summarized financial information for INOVA Geophysical. The Company measures segment operating results based on income from operations.

A summary of segment information is as follows (in thousands):

	Three Months Ended March 31,
	2014			2013
Net revenues:
Solutions:
New Venture	$	32,738		$	48,436
Data Library	13,217			9,448
Total multi-client revenues	45,955			57,884
Data Processing	43,286			31,286
Total	$	89,241		$	89,170
Systems:
Towed Streamer	$	11,851		$	13,549
Ocean Bottom Equipment	—			6,765
Other	12,997			11,533
Total	$	24,848		$	31,847
Software:
Software Systems	$	9,154		$	7,941
Services	885			779
Total	$	10,039		$	8,720
Ocean Bottom Services	$	20,570		$	—
Total	$	144,698		$	129,737
Gross profit:
Solutions	$	33,011		$	20,197
Systems	11,417			8,380
Software	7,257			6,380
Ocean Bottom Services	5,169			—
Total	$	56,854		$	34,957
Gross margin:
Solutions	37		%	23		%
Systems	46		%	26		%
Software	72		%	73		%
Ocean Bottom Services	25		%	—		%
Total	39		%	27		%
Income from operations:
Solutions	$	19,112		$	7,357
Systems	3,371			934
Software	5,128			5,161
Ocean Bottom Services	4,162			—
Corporate and other	(12,102		)	(11,529		)
Income from operations	19,671			1,923
Interest expense, net	(4,797		)	(1,066		)
Equity in earnings (losses) of investments	(1,688		)	1,116
Other income, net	68,526			1,027
Income before income taxes	$	81,712		$	3,000

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Long-term Debt Redemption Percentages for Future Periods (Details)	3 Months Ended
	Mar. 31, 2014
2015
Debt Instrument Redemption [Line Items]
Notes redemption percentages	104.062%
2016
Debt Instrument Redemption [Line Items]
Notes redemption percentages	102.031%
2017 and thereafter
Debt Instrument Redemption [Line Items]
Notes redemption percentages	100.00%

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Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) (Tables)

3 Months Ended

Mar. 31, 2014

Equity [Abstract]

Summary of Changes in Accumulated Other Comprehensive Income (Loss)

A summary of changes in accumulated other comprehensive income (loss) by component is as follows (in thousands):

	Foreign currency translation adjustments			Equity interest in investees’ other comprehensive income (loss)			Other changes in other comprehensive income (loss)			Total
Accumulated other comprehensive income (loss) at December 31, 2013	$	(11,923	)	$	841		$	(56	)	$	(11,138	)
Net current-period other comprehensive income (loss)	486			(1,173		)	26			(661		)
Accumulated other comprehensive income (loss) at March 31, 2014	$	(11,437	)	$	(332	)	$	(30	)	$	(11,799	)

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Details of Selected Balance Sheet Accounts (Tables)

3 Months Ended

Mar. 31, 2014

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Inventories

A summary of inventories is as follows (in thousands):	March 31, 2014			December 31, 2013
Raw materials and subassemblies	$	56,252		$	54,168
Work-in-process	2,428			2,297
Finished goods	27,285			33,263
Reserve for excess and obsolete inventories	(31,256		)	(32,555		)
Total	$	54,709		$	57,173

Summary of Other Long-term Liabilities

A summary of other long-term liabilities is as follows (in thousands):	March 31, 2014		December 31, 2013
Accrual for loss contingency related to legal proceedings (Note 8)	$	123,770	$	193,327
Facility restructuring accrual	4,818		4,837
Other long-term liabilities	14,399		12,438
Total	$	142,987	$	210,602

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Condensed Consolidating Financial Information - Condensed Income Statement (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Condensed Income Statements, Captions [Line Items]
Total net revenues	$ 144,698	$ 129,737
Cost of goods sold	87,844	94,780
Gross profit	56,854	34,957
Total operating expenses	37,183	33,034
Income (loss) from operations	19,671	1,923
Interest expense, net	(4,797)	(1,066)
Intercompany interest, net	0	0
Equity in earnings (losses) of investments	(1,688)	1,116
Other income (expense)	68,526	1,027
Income (loss) before income taxes	81,712	3,000
Income tax expense (benefit)	5,263	1,201
Net income	76,449	1,799
Net income (loss) attributable to noncontrolling interests	(470)	76
Net income (loss) attributable to ION	75,979	1,875
Preferred stock dividends	0	338
Net income (loss) applicable to common shares	75,979	1,537
Comprehensive net income (loss)	75,788	(1,857)
Comprehensive income (loss) attributable to noncontrolling interest	(470)	76
Comprehensive net income (loss) attributable to ION	75,318	(1,781)
Reportable Legal Entities [Member] | ION Geophysical Corporation [Member]
Condensed Income Statements, Captions [Line Items]
Total net revenues	0	0
Cost of goods sold	0	0
Gross profit	0	0
Total operating expenses	9,021	8,030
Income (loss) from operations	(9,021)	(8,030)
Interest expense, net	(4,573)	(1,025)
Intercompany interest, net	66	82
Equity in earnings (losses) of investments	89,488	5,837
Other income (expense)	497	340
Income (loss) before income taxes	76,457	(2,796)
Income tax expense (benefit)	478	(4,671)
Net income	75,979	1,875
Net income (loss) attributable to noncontrolling interests	0	0
Net income (loss) attributable to ION	75,979	1,875
Preferred stock dividends		338
Net income (loss) applicable to common shares		1,537
Comprehensive net income (loss)	75,318	(1,781)
Comprehensive income (loss) attributable to noncontrolling interest	0	0
Comprehensive net income (loss) attributable to ION	75,318	(1,781)
Reportable Legal Entities [Member] | The Guarantors [Member]
Condensed Income Statements, Captions [Line Items]
Total net revenues	78,122	73,922
Cost of goods sold	43,996	60,183
Gross profit	34,126	13,739
Total operating expenses	15,255	16,357
Income (loss) from operations	18,871	(2,618)
Interest expense, net	(42)	22
Intercompany interest, net	(435)	(269)
Equity in earnings (losses) of investments	3,856	6,634
Other income (expense)	69,911	8
Income (loss) before income taxes	92,161	3,777
Income tax expense (benefit)	332	(768)
Net income	91,829	4,545
Net income (loss) attributable to noncontrolling interests	0	0
Net income (loss) attributable to ION	91,829	4,545
Preferred stock dividends		0
Net income (loss) applicable to common shares		4,545
Comprehensive net income (loss)	91,828	4,546
Comprehensive income (loss) attributable to noncontrolling interest	0	0
Comprehensive net income (loss) attributable to ION	91,828	4,546
Reportable Legal Entities [Member] | All Other Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Total net revenues	66,576	55,815
Cost of goods sold	43,848	34,597
Gross profit	22,728	21,218
Total operating expenses	12,907	8,647
Income (loss) from operations	9,821	12,571
Interest expense, net	(182)	(63)
Intercompany interest, net	369	187
Equity in earnings (losses) of investments	738	(735)
Other income (expense)	(1,882)	679
Income (loss) before income taxes	8,864	12,639
Income tax expense (benefit)	4,453	6,640
Net income	4,411	5,999
Net income (loss) attributable to noncontrolling interests	(470)	76
Net income (loss) attributable to ION	3,941	6,075
Preferred stock dividends		0
Net income (loss) applicable to common shares		6,075
Comprehensive net income (loss)	4,901	2,275
Comprehensive income (loss) attributable to noncontrolling interest	(470)	76
Comprehensive net income (loss) attributable to ION	4,431	2,351
Consolidation, Eliminations [Member]
Condensed Income Statements, Captions [Line Items]
Total net revenues	0	0
Cost of goods sold	0	0
Gross profit	0	0
Total operating expenses	0	0
Income (loss) from operations	0	0
Interest expense, net	0	0
Intercompany interest, net	0	0
Equity in earnings (losses) of investments	(95,770)	(10,620)
Other income (expense)	0	0
Income (loss) before income taxes	(95,770)	(10,620)
Income tax expense (benefit)	0	0
Net income	(95,770)	(10,620)
Net income (loss) attributable to noncontrolling interests	0	0
Net income (loss) attributable to ION	(95,770)	(10,620)
Preferred stock dividends		0
Net income (loss) applicable to common shares		(10,620)
Comprehensive net income (loss)	(96,259)	(6,897)
Comprehensive income (loss) attributable to noncontrolling interest	0	0
Comprehensive net income (loss) attributable to ION	$ (96,259)	$ (6,897)

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Net Income per Share - Narrative (Details)	Mar. 31, 2014	Sep. 30, 2013	Sep. 29, 2013	Mar. 31, 2013
Earnings Per Share [Abstract]
Number of shares issued or committed for issuance under outstanding stock options	9,660,100			7,717,937
Number of shares of restricted stock and shares reserved for restricted stock units outstanding	1,237,123			1,034,280
Preferred stock shares outstanding			27,000
Number of common stock issuable upon conversion of remaining cumulative convertible preferred stock		6,065,075

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Supplemental Cash Flow Information and Non-Cash Activity (Tables)

3 Months Ended

Mar. 31, 2014

Supplemental Cash Flow Elements [Abstract]

Summary of Non-cash Items from Investing and Financing Activities

A summary of non-cash items from investing and financing activities is as follows (in thousands):

	Three Months Ended March 31,
	2014		2013
Purchases of computer equipment financed through capital leases	$	1,952	$	—
Transfer of inventory to property, plant, equipment and seismic rental equipment	$	2,308	$	134

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Condensed Consolidating Financial Information (Tables)

3 Months Ended

Mar. 31, 2014

Condensed Financial Information of Parent Company Only Disclosure [Abstract]

Condensed Balance Sheet

	March 31, 2014
Balance Sheet	ION Geophysical Corporation			The Guarantors			All Other Subsidiaries			Consolidating Adjustments			Total Consolidated
	(In thousands)
ASSETS
Current assets:
Cash and cash equivalents	$	154,845		$	1,539		$	40,922		$	—		$	197,306
Accounts receivable, net	2,532			46,308			49,391			—			98,231
Unbilled receivables	—			55,168			13,284			—			68,452
Inventories	—			5,658			49,051			—			54,709
Prepaid expenses and other current assets	12,087			4,897			10,391			(1,770		)	25,605
Total current assets	169,464			113,570			163,039			(1,770		)	444,303
Deferred income tax asset	6,500			6,675			758			406			14,339
Property, plant, equipment and seismic rental equipment, net	6,152			29,977			23,682			—			59,811
Multi-client data library, net	—			213,272			29,811			—			243,083
Equity method investments	47,466			—			—			—			47,466
Investment in subsidiaries	785,917			256,637			—			(1,042,554		)	—
Goodwill	—			26,984			29,127			—			56,111
Intangible assets, net	—			7,747			2,819			—			10,566
Intercompany receivables	50,557			—			—			(50,557		)	—
Other assets	13,845			46			24,249			(22,500		)	15,640
Total assets	$	1,079,901		$	654,908		$	273,485		$	(1,116,975	)	$	891,319
LIABILITIES AND EQUITY
Current liabilities:
Current maturities of long-term debt	$	50,000		$	4,794		$	5,757		$	—		$	60,551
Accounts payable	2,001			13,078			23,575			—			38,654
Accrued expenses	15,888			41,532			16,133			(1,082		)	72,471
Accrued multi-client data library royalties	—			37,648			615			—			38,263
Deferred revenue	—			12,689			3,341			—			16,030
Total current liabilities	67,889			109,741			49,421			(1,082		)	225,969
Long-term debt, net of current maturities	175,000			4,073			1,389			—			180,462
Intercompany payables	467,223			34,145			16,412			(517,780		)	—
Other long-term liabilities	33,957			121,617			10,195			(22,782		)	142,987
Total liabilities	744,069			269,576			77,417			(541,644		)	549,418
Redeemable noncontrolling interests	—			—			5,552			—			5,552
Stockholders’ equity:
Common stock	1,640			290,460			22,362			(312,822		)	1,640
Additional paid-in capital	882,892			175,005			235,994			(410,999		)	882,892
Accumulated earnings (deficit)	(530,178		)	324,015			(69		)	(323,946		)	(530,178		)
Accumulated other comprehensive income (loss)	(11,799		)	6,217			(11,430		)	5,213			(11,799		)
Due from ION Geophysical Corporation	—			(410,365		)	(56,858		)	467,223			—
Treasury stock	(6,565		)	—			—			—			(6,565		)
Total stockholders’ equity	335,990			385,332			189,999			(575,331		)	335,990
Noncontrolling interests	(158		)	—			517			—			359
Total equity	335,832			385,332			190,516			(575,331		)	336,349
Total liabilities and equity	$	1,079,901		$	654,908		$	273,485		$	(1,116,975	)	$	891,319

	December 31, 2013
Balance Sheet	ION Geophysical Corporation			The Guarantors			All Other Subsidiaries			Consolidating Adjustments			Total Consolidated
	(In thousands)
ASSETS
Current assets:
Cash and cash equivalents	$	124,701		$	—		$	23,355		$	—		$	148,056
Accounts receivable, net	1,874			99,547			48,027			—			149,448
Unbilled receivables	—			33,490			15,978			—			49,468
Inventories	—			6,595			50,578			—			57,173
Prepaid expenses and other current assets	12,888			5,030			7,438			(584		)	24,772
Total current assets	139,463			144,662			145,376			(584		)	428,917
Deferred income tax asset	6,513			6,960			489			688			14,650
Property, plant, equipment and seismic rental equipment, net	6,440			29,845			10,399			—			46,684
Multi-client data library, net	—			212,572			26,212			—			238,784
Equity method investments	51,065			—			2,800			—			53,865
Investment in subsidiaries	699,695			248,482			—			(948,177		)	—
Goodwill	—			26,984			28,892			—			55,876
Intangible assets, net	—			8,246			3,001			—			11,247
Intercompany receivables	8,313			13,419			—			(21,732		)	—
Other assets	14,315			56			24,262			(23,985		)	14,648
Total assets	$	925,804		$	691,226		$	241,431		$	(993,790	)	$	864,671
LIABILITIES AND EQUITY
Current liabilities:
Current maturities of long-term debt	$	—		$	4,716		$	1,190		$	—		$	5,906
Accounts payable	3,515			11,741			7,364			34			22,654
Accrued expenses	16,652			54,250			13,392			64			84,358
Accrued multi-client data library royalties	—			45,921			539			—			46,460
Deferred revenue	—			16,387			4,295			—			20,682
Total current liabilities	20,167			133,015			26,780			98			180,060
Long-term debt, net of current maturities	210,000			3,655			591			—			214,246
Intercompany payables	426,134			—			21,732			(447,866		)	—
Other long-term liabilities	11,757			214,211			8,637			(24,003		)	210,602
Total liabilities	668,058			350,881			57,740			(471,771		)	604,908
Redeemable noncontrolling interests	—			—			1,878			—			1,878
Stockholders’ equity:
Common stock	1,637			290,460			19,138			(309,598		)	1,637
Additional paid-in capital	879,969			180,700			235,381			(416,081		)	879,969
Accumulated earnings (deficit)	(606,157		)	232,186			(4,010		)	(228,176		)	(606,157		)
Accumulated other comprehensive income (loss)	(11,138		)	6,218			(11,920		)	5,702			(11,138		)
Due from ION Geophysical Corporation	—			(369,219		)	(56,915		)	426,134			—
Treasury stock	(6,565		)	—			—			—			(6,565		)
Total stockholders’ equity	257,746			340,345			181,674			(522,019		)	257,746
Noncontrolling interests	—			—			139			—			139
Total equity	257,746			340,345			181,813			(522,019		)	257,885
Total liabilities and equity	$	925,804		$	691,226		$	241,431		$	(993,790	)	$	864,671

Condensed Income Statement

	Three Months Ended March 31, 2014
Income Statement	ION Geophysical Corporation			The Guarantors			All Other Subsidiaries			Consolidating Adjustments			Total Consolidated
	(In thousands)
Total net revenues	$	—		$	78,122		$	66,576		$	—		$	144,698
Cost of goods sold	—			43,996			43,848			—			87,844
Gross profit	—			34,126			22,728			—			56,854
Total operating expenses	9,021			15,255			12,907			—			37,183
Income (loss) from operations	(9,021		)	18,871			9,821			—			19,671
Interest expense, net	(4,573		)	(42		)	(182		)	—			(4,797		)
Intercompany interest, net	66			(435		)	369			—			—
Equity in earnings (losses) of investments	89,488			3,856			738			(95,770		)	(1,688		)
Other income (expense)	497			69,911			(1,882		)	—			68,526
Net income before income taxes	76,457			92,161			8,864			(95,770		)	81,712
Income tax expense	478			332			4,453			—			5,263
Net income	75,979			91,829			4,411			(95,770		)	76,449
Net income attributable to noncontrolling interests	—			—			(470		)	—			(470		)
Net income applicable to common shares	$	75,979		$	91,829		$	3,941		$	(95,770	)	$	75,979
Comprehensive net income	$	75,318		$	91,828		$	4,901		$	(96,259	)	$	75,788
Comprehensive income attributable to noncontrolling interest	—			—			(470		)	—			(470		)
Comprehensive net income attributable to ION	$	75,318		$	91,828		$	4,431		$	(96,259	)	$	75,318

	Three Months Ended March 31, 2013
Income Statement	ION Geophysical Corporation			The Guarantors			All Other Subsidiaries			Consolidating Adjustments			Total Consolidated
	(In thousands)
Total net revenues	$	—		$	73,922		$	55,815		$	—		$	129,737
Cost of goods sold	—			60,183			34,597			—			94,780
Gross profit	—			13,739			21,218			—			34,957
Total operating expenses	8,030			16,357			8,647			—			33,034
Income (loss) from operations	(8,030		)	(2,618		)	12,571			—			1,923
Interest expense, net	(1,025		)	22			(63		)	—			(1,066		)
Intercompany interest, net	82			(269		)	187			—			—
Equity in earnings (losses) of investments	5,837			6,634			(735		)	(10,620		)	1,116
Other income	340			8			679			—			1,027
Net income (loss) before income taxes	(2,796		)	3,777			12,639			(10,620		)	3,000
Income tax expense (benefit)	(4,671		)	(768		)	6,640			—			1,201
Net income	1,875			4,545			5,999			(10,620		)	1,799
Net loss attributable to noncontrolling interests	—			—			76			—			76
Net income attributable to ION	1,875			4,545			6,075			(10,620		)	1,875
Preferred stock dividends	338			—			—			—			338
Net income applicable to common shares	$	1,537		$	4,545		$	6,075		$	(10,620	)	$	1,537
Comprehensive net income (loss)	$	(1,781	)	$	4,546		$	2,275		$	(6,897	)	$	(1,857	)
Comprehensive loss attributable to noncontrolling interest	—			—			76			—			76
Comprehensive net income (loss) attributable to ION	$	(1,781	)	$	4,546		$	2,351		$	(6,897	)	$	(1,781	)

Condensed Cash Flow Statement

	Three Months Ended March 31, 2014
Statement of Cash Flows	ION Geophysical Corporation			The Guarantors			All Other Subsidiaries			Consolidating Adjustments		Total Consolidated
	(In thousands)
Cash flows from operating activities:
Net cash provided by operating activities	$	15,105		$	19,989		$	27,588		$	—	$	62,682
Cash flows from investing activities:
Cash invested in multi-client data library	—			(22,299		)	(54		)	—		(22,353		)
Purchase of property, plant, equipment and seismic rental equipment	(551		)	(1,230		)	(216		)	—		(1,997		)
Repayment of advances by INOVA Geophysical	1,000			—			—			—		1,000
Investment in and advances to OceanGeo B.V.	—			—			(3,683		)	—		(3,683		)
Cash of OceanGeo B.V. upon acquiring a controlling interest	—			—			609			—		609
Other investing activities	579			26			—			—		605
Net cash provided by (used in) investing activities	1,028			(23,503		)	(3,344		)	—		(25,819		)
Cash flows from financing activities:
Borrowings under revolving line of credit	15,000			—			—			—		15,000
Payments on notes payable and long-term debt	—			(1,365		)	(1,390		)	—		(2,755		)
Intercompany lending	(1,155		)	6,418			(5,263		)	—		—
Proceeds from employee stock purchases and exercise of stock options	246			—			—			—		246
Other financing activities	(80		)	—			—			—		(80		)
Net cash provided by (used in) financing activities	14,011			5,053			(6,653		)	—		12,411
Effect of change in foreign currency exchange rates on cash and cash equivalents	—			—			(24		)	—		(24		)
Net increase in cash and cash equivalents	30,144			1,539			17,567			—		49,250
Cash and cash equivalents at beginning of period	124,701			—			23,355			—		148,056
Cash and cash equivalents at end of period	$	154,845		$	1,539		$	40,922		$	—	$	197,306

	Three Months Ended March 31, 2013
Statement of Cash Flows	ION Geophysical Corporation			The Guarantors			All Other Subsidiaries			Consolidating Adjustments		Total Consolidated
	(In thousands)
Cash flows from operating activities:
Net cash provided by operating activities	$	16,769		$	7,813		$	25,009		$	—	$	49,591
Cash flows from investing activities:
Cash invested in multi-client data library	—			(13,076		)	(15,702		)	—		(28,778		)
Purchase of property, plant, equipment and seismic rental equipment	—			(3,774		)	—			—		(3,774		)
Investment in and advances to OceanGeo B.V.	(8,000		)	—			(1,500		)	—		(9,500		)
Investment in convertible notes	(1,000		)	—			—			—		(1,000		)
Other investing activities	—			—			76			—		76
Net cash used in investing activities	(9,000		)	(16,850		)	(17,126		)	—		(42,976		)
Cash flows from financing activities:
Payments on notes payable and long-term debt	—			(597		)	(251		)	—		(848		)
Intercompany lending	(26,286		)	9,634			16,652			—		—
Payment of preferred dividends	(338		)	—			—			—		(338		)
Proceeds from employee stock purchases and exercise of stock options	716			—			—			—		716
Other financing activities	350			—			—			—		350
Net cash provided by (used in) financing activities	(25,558		)	9,037			16,401			—		(120		)
Effect of change in foreign currency exchange rates on cash and cash equivalents	—			—			(891		)	—		(891		)
Net increase (decrease) in cash and cash equivalents	(17,789		)	—			23,393			—		5,604
Cash and cash equivalents at beginning of period	30,343			—			30,628			—		60,971
Cash and cash equivalents at end of period	$	12,554		$	—		$	54,021		$	—	$	66,575

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Acquisition of Controlling Interest in OceanGeo

3 Months Ended

Mar. 31, 2014

Business Combinations [Abstract]

Business Combination Disclosure [Text Block]

Acquisition of Controlling Interest in OceanGeo

In October 2013, the Company reached agreement with its joint venture partner in OceanGeo, Georadar Levantamentos Geofisicos S/A, for the Company to have the option to increase its ownership percentage in OceanGeo from 30% to 70%, subject to certain conditions. OceanGeo is headquartered in Rio de Janeiro, Brazil, and specializes in seismic acquisition operations using ocean-bottom cables deployed from vessels leased by OceanGeo.

To further assist OceanGeo in acquiring backlog, in October 2013 the Company also agreed to loan OceanGeo additional funds for working capital, subject to the Company’s agreement on the necessity and purpose for each advance and certain other conditions, up to a maximum of $25.0 million. As of December 31, 2013, the Company had advanced $15.3 million, and thereafter in January 2014, prior to obtaining the controlling interest, the Company advanced an additional $3.7 million.

In January, the Company exercised its option, increasing its ownership percentage through the conversion of certain outstanding amounts loaned to OceanGeo. The Company acquired its ownership interest in OceanGeo as part of its strategy to expand the range of service offerings it can provide to oil and gas exploration and production customers and to put its Calypso^® seabed acquisition technology to work in a service model to meet the growing demand for seabed seismic services.

The acquisition was accounted for by the acquisition method, whereby the assets acquired and liabilities assumed were recorded at their fair values as of the acquisition date based on an income approach. The estimated fair value of the assets acquired and liabilities assumed approximated the purchase price and therefore no goodwill or bargain purchase was recognized. As of March 31, 2014, the allocation of the purchase price of OceanGeo was based upon preliminary fair value studies, and may be subject to change as additional information becomes available. In connection with the acquisition, the Company incurred $1.3 million in acquisition-related transaction costs related to professional services and fees. These costs were expensed as incurred and were included in other income (expense), net in the Company’s condensed consolidated statement of operations for the three months ended March 31, 2014. As a result of consolidating OceanGeo’s results into the Company’s consolidated results of operations for the period from the acquisition date at the end of January to March 31, 2014, the Company’s results of operations include $20.6 million of OceanGeo revenues and $4.2 million of income from OceanGeo’s operations for the three months ended March 31, 2014. For additional results related to OceanGeo, see Note 3 “Segment Information.” The following table summarizes the fair value assigned to the assets acquired and liabilities assumed, as well as the noncontrolling interest, at the acquisition date (in thousands):

Estimated Fair Value of Assets Acquired and Liabilities Assumed:
Cash and cash equivalents	$	609
Accounts receivable	9,247
Prepaid expenses and other current assets	1,433
Multi-client data library	3,876
Property, plant, equipment and seismic rental equipment, net	14,598
Other assets	2,227
Total identifiable assets	31,990
Accounts payable and accrued liabilities	(13,464		)
Bank loans	(6,135		)
Other liabilities	(1,026		)
Net assets	11,365
Noncontrolling interest	(3,410		)
Total consideration	$	7,955

The following summarized unaudited pro forma consolidated income statement information for the three months ended March 31, 2014 and 2013, assumes that the OceanGeo acquisition had occurred as of the beginning of the periods presented. The Company has prepared these unaudited pro forma financial results for comparative purposes only. These unaudited pro forma financial results may not be indicative of the results that would have occurred if ION had completed the acquisition as of the beginning of the periods presented or the results that may be attained in the future. Amounts presented below are in thousands, except for the per share amounts:

Pro forma Consolidated ION Income Statement Information	Three Months Ended March 31,
	2014		2013
Net revenues	$	153,882	$	147,706
Income from operations	$	23,747	$	4,291
Net income	$	77,968	$	4,010
Net income attributable to ION	$	76,821	$	3,164
Basic net income per common share	$	0.47	$	0.02
Diluted net income per common share	$	0.47	$	0.02

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Other Income, Net (Tables)

3 Months Ended

Mar. 31, 2014

Other Income and Expenses [Abstract]

Schedule of Other Income, Net

A summary of other income, net is as follows (in thousands):

	Three Months Ended March 31,
	2014			2013
Reduction of accrual for loss contingency related to legal proceedings (Note 8)	$	69,557		$	—
Other income (expense), net	(1,031		)	1,027
Total other income, net	$	68,526		$	1,027

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Equity Method Investments Income (Loss) (Details) (INOVA Geophysical [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
INOVA Geophysical [Member]
Schedule of Equity Method Investments [Line Items]
Net revenues	$ 40,176	$ 59,611
Gross profit	4,948	12,327
Loss from operations	(3,667)	(250)
Net income (loss)	$ (4,951)	$ 3,742

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Related Party Transactions (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		1 Months Ended
	Mar. 31, 2014 BGP Joint Venture [Member]	Mar. 31, 2013 BGP Joint Venture [Member]	Sep. 30, 2013 INOVA Geophysical [Member]	Mar. 31, 2014 INOVA Geophysical [Member]	Dec. 31, 2013 INOVA Geophysical [Member]	Jul. 31, 2013 INOVA Geophysical [Member]	Jul. 31, 2013 LIBOR INOVA Geophysical [Member]
Property Subject to or Available for Operating Lease [Line Items]
Company's outstanding common stock owned by BGP	14.50%
Related party transaction, revenues from transactions with related party	$ 2.0	$ 0.9
Receivables due from BGP	2.4
Loan made to equity method investee						10.0
Basis spread on annual rate of loan							6.50%
Value of receivables due from related party				4.0	10.0
Payment received on related party debt			$ 6.0

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Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 197,306	$ 148,056
Accounts receivable, net	98,231	149,448
Unbilled receivables	68,452	49,468
Inventories	54,709	57,173
Prepaid expenses and other current assets	25,605	24,772
Total current assets	444,303	428,917
Deferred income tax asset	14,339	14,650
Property, plant, equipment and seismic rental equipment, net	59,811	46,684
Multi-client data library, net	243,083	238,784
Equity method investments	47,466	53,865
Goodwill	56,111	55,876
Intangible assets, net	10,566	11,247
Other assets	15,640	14,648
Total assets	891,319	864,671
Current liabilities:
Current maturities of long-term debt	60,551	5,906
Accounts payable	38,654	22,654
Accrued expenses	72,471	84,358
Accrued multi-client data library royalties	38,263	46,460
Deferred revenue	16,030	20,682
Total current liabilities	225,969	180,060
Long-term debt, net of current maturities	180,462	214,246
Other long-term liabilities	142,987	210,602
Total liabilities	549,418	604,908
Redeemable noncontrolling interest	5,552	1,878
Equity:
Common stock, $0.01 par value; authorized 200,000,000 shares; outstanding 164,049,309 and 163,737,757 shares at March 31, 2014 and December 31, 2013, respectively, net of treasury stock	1,640	1,637
Additional paid-in capital	882,892	879,969
Accumulated deficit	(530,178)	(606,157)
Accumulated other comprehensive loss	(11,799)	(11,138)
Treasury stock, at cost, 849,539 shares at both March 31, 2014 and December 31, 2013	(6,565)	(6,565)
Total stockholders' equity	335,990	257,746
Noncontrolling interests	359	139
Total equity	336,349	257,885
Total liabilities and equity	$ 891,319	$ 864,671

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Net Income per Share - Basic and Diluted Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income (loss) applicable to common shares	$ 75,979	$ 1,537
Weighted average number of common shares outstanding	163,847	156,465
Effect of dilutive stock awards and convertible preferred stock	214	850
Weighted average number of diluted common shares outstanding	164,061	157,315
Basic net income per share	$ 0.46	$ 0.01
Diluted net income per share	$ 0.46	$ 0.01
Series D Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income (loss) applicable to common shares	$ 75,979	$ 1,537

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Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net income	$ 76,449	$ 1,799
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization (other than multi-client library)	7,904	4,200
Amortization of multi-client library	16,326	18,592
Stock-based compensation expense	2,777	2,011
Equity in earnings (losses) of investments	1,688	(1,116)
Reduction of accrual for loss contingency related to legal proceedings	(69,557)	0
Deferred income taxes	(884)	(6,150)
Change in operating assets and liabilities:
Accounts receivable	60,646	35,307
Unbilled receivables	(18,945)	11,938
Inventories	(144)	1,381
Accounts payable, accrued expenses and accrued royalties	(5,359)	(13,373)
Deferred revenue	(4,678)	(7,153)
Other assets and liabilities	(3,541)	2,155
Net cash provided by operating activities	62,682	49,591
Cash flows from investing activities:
Cash invested in multi-client data library	(22,353)	(28,778)
Purchase of property, plant, equipment and seismic rental assets	(1,997)	(3,774)
Repayment of advances to INOVA Geophysical	1,000	0
Investment in and advances to OceanGeo B.V.	(3,683)	(9,500)
Cash of OceanGeo B.V. upon acquiring a controlling interest	609	0
Investment in convertible note	0	(1,000)
Other investing activities	605	76
Net cash used in investing activities	(25,819)	(42,976)
Cash flows from financing activities:
Borrowings under revolving line of credit	15,000	0
Payments on long-term debt	(2,755)	(848)
Payment of preferred dividends	0	(338)
Proceeds from exercise of stock options	246	716
Other financing activities	(80)	350
Net cash provided by (used in) financing activities	12,411	(120)
Effect of change in foreign currency exchange rates on cash and cash equivalents	(24)	(891)
Net increase in cash and cash equivalents	49,250	5,604
Cash and cash equivalents at beginning of period	148,056	60,971
Cash and cash equivalents at end of period	$ 197,306	$ 66,575

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Acquisition of Controlling Interest in OceanGeo - Assets and Liabilities Assumed (Details) (OceanGeo [Member], USD $) In Thousands, unless otherwise specified	0 Months Ended
	Jan. 31, 2014
OceanGeo [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	$ 609
Accounts receivable	9,247
Prepaid expenses and other current assets	1,433
Multi-client data library	3,876
Property, plant, equipment and seismic rental equipment, net	14,598
Other assets	2,227
Total identifiable assets	31,990
Accounts payable and accrued liabilities	(13,464)
Bank loans	(6,135)
Other liabilities	(1,026)
Net assets	11,365
Noncontrolling interest	(3,410)
Total consideration	$ 7,955

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Other Income, Net

3 Months Ended

Mar. 31, 2014

Other Income and Expenses [Abstract]

Other Income, Net

Other Income, Net

A summary of other income, net is as follows (in thousands):

	Three Months Ended March 31,
	2014			2013
Reduction of accrual for loss contingency related to legal proceedings (Note 8)	$	69,557		$	—
Other income (expense), net	(1,031		)	1,027
Total other income, net	$	68,526		$	1,027

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Acquisition of Controlling Interest in OceanGeo - Pro Forma Income Statement Information (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Business Combinations [Abstract]
Net revenues	$ 153,882	$ 147,706
Income from operations	23,747	4,291
Net income	77,968	4,010
Net income attributable to ION	$ 76,821	$ 3,164
Basic net income per common share	$ 0.47	$ 0.02
Diluted net income per common share	$ 0.47	$ 0.02

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Segment Information (Tables)

3 Months Ended

Mar. 31, 2014

Segment Reporting [Abstract]

Summary of Segment Information

A summary of segment information is as follows (in thousands):

	Three Months Ended March 31,
	2014			2013
Net revenues:
Solutions:
New Venture	$	32,738		$	48,436
Data Library	13,217			9,448
Total multi-client revenues	45,955			57,884
Data Processing	43,286			31,286
Total	$	89,241		$	89,170
Systems:
Towed Streamer	$	11,851		$	13,549
Ocean Bottom Equipment	—			6,765
Other	12,997			11,533
Total	$	24,848		$	31,847
Software:
Software Systems	$	9,154		$	7,941
Services	885			779
Total	$	10,039		$	8,720
Ocean Bottom Services	$	20,570		$	—
Total	$	144,698		$	129,737
Gross profit:
Solutions	$	33,011		$	20,197
Systems	11,417			8,380
Software	7,257			6,380
Ocean Bottom Services	5,169			—
Total	$	56,854		$	34,957
Gross margin:
Solutions	37		%	23		%
Systems	46		%	26		%
Software	72		%	73		%
Ocean Bottom Services	25		%	—		%
Total	39		%	27		%
Income from operations:
Solutions	$	19,112		$	7,357
Systems	3,371			934
Software	5,128			5,161
Ocean Bottom Services	4,162			—
Corporate and other	(12,102		)	(11,529		)
Income from operations	19,671			1,923
Interest expense, net	(4,797		)	(1,066		)
Equity in earnings (losses) of investments	(1,688		)	1,116
Other income, net	68,526			1,027
Income before income taxes	$	81,712		$	3,000

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Basis of Presentation

3 Months Ended

Mar. 31, 2014

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

Basis of Presentation

The condensed consolidated balance sheet of ION Geophysical Corporation and its subsidiaries (collectively referred to as the “Company” or “ION,” unless the context otherwise requires) at December 31, 2013 has been derived from the Company’s audited consolidated financial statements at that date. The condensed consolidated balance sheet at March 31, 2014, and the condensed consolidated statements of operations, comprehensive income (loss) and cash flows for the three months ended March 31, 2014 and 2013, are unaudited. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. The results of operations for the three months ended March 31, 2014 are not necessarily indicative of the operating results for a full year or of future operations.

In late January 2014, the Company acquired an additional 40% interest in OceanGeo B.V. (“OceanGeo”) through the conversion of the outstanding indebtedness owed to the Company by OceanGeo into additional equity interests of OceanGeo, bringing the Company’s total equity interest to 70% and giving the Company control over OceanGeo. The Company has included in its results of operations, the results of OceanGeo from the date of the Company’s acquisition of the controlling interest.

These condensed consolidated financial statements have been prepared using accounting principles generally accepted in the United States for interim financial information and the instructions to Form 10-Q and applicable rules of Regulation S-X of the Securities and Exchange Commission (the “SEC”). Certain information and footnote disclosures normally included in annual financial statements presented in accordance with accounting principles generally accepted in the United States have been omitted. The accompanying condensed consolidated financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2013 and Amendment No. 1 thereto on Form 10-K/A, which was filed on March 28, 2014 and contains the separate consolidated financial statements of INOVA Geophysical Equipment Limited (“INOVA Geophysical”) for its fiscal year ended December 31, 2013.

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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares outstanding	164,049,309	163,737,757
Treasury stock, shares	849,539	849,539

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Supplemental Cash Flow Information and Non-Cash Activity Supplemental Cash Flow Information and Non-Cash Activity

3 Months Ended

Mar. 31, 2014

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information and Non-cash Activity

Supplemental Cash Flow Information and Non-cash Activity

A summary of non-cash items from investing and financing activities is as follows (in thousands):

	Three Months Ended March 31,
	2014		2013
Purchases of computer equipment financed through capital leases	$	1,952	$	—
Transfer of inventory to property, plant, equipment and seismic rental equipment	$	2,308	$	134

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Document and Entity Information	3 Months Ended
	Mar. 31, 2014	Apr. 21, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	ION GEOPHYSICAL CORP
Entity Central Index Key	0000866609
Document Type	10-Q
Document Period End Date	Mar. 31, 2014
Amendment Flag	false
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		164,049,309.000

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Fair Value of Financial Instruments

3 Months Ended

Mar. 31, 2014

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

Fair Value of Financial Instruments

Authoritative guidance on fair value measurements defines fair value, establishes a framework for measuring fair value and stipulates the related disclosure requirements. The Company follows a three-level hierarchy, prioritizing and defining the types of inputs used to measure fair value.

Investment in Convertible Note. In March 2012, the Company and a privately owned U.S.-based technology company entered into an agreement for the Company to make available to the technology company a credit facility in an amount of up to $4.0 million. The credit facility has since been amended, such that the current maturity date is March 2015, the annual interest rate is 0.25%, and the conversion provision allows for conversion of any or all of the outstanding balance of the promissory note under the credit facility into common shares of the technology company. As of March 31, 2014, the technology company had drawn $4.0 million under this credit arrangement.

The Company performed a fair value analysis with respect to its investment in the convertible note using Level 3 inputs. These inputs included a market approach, including the terms and likelihood of an investment event. As of March 31, 2014, the fair value of this investment was approximately $4.2 million, including accrued interest.

Fair Value of Other Financial Instruments. Due to their highly liquid nature, the amount of the Company’s other financial instruments, including cash and cash equivalents, accounts and unbilled receivables, notes receivable, accounts payable, and accrued multi-client data library royalties, represent their approximate fair value.

The carrying amounts of the Company’s long-term debt as of March 31, 2014 and December 31, 2013 were $241.0 million and $220.2 million, respectively, compared to its fair values of $228.8 million and $190.4 million as of March 31, 2014 and December 31, 2013, respectively. The fair value of the long-term debt was calculated using a market approach based upon Level 2 inputs, including a price quote from a major financial institution.

The Company’s cost method investments for which quoted market prices are not available are recorded at cost and reviewed periodically if there are events or changes in circumstances that may have a significant adverse effect on the fair value of the investments.

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Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Statement [Abstract]
Service revenues	$ 110,696	$ 89,949
Product revenues	34,002	39,788
Total net revenues	144,698	129,737
Cost of services	72,071	69,273
Cost of products	15,773	25,507
Gross profit	56,854	34,957
Operating expenses:
Research, development and engineering	9,039	9,290
Marketing and sales	9,213	7,980
General, administrative and other operating expenses	18,931	15,764
Total operating expenses	37,183	33,034
Income (loss) from operations	19,671	1,923
Interest expense, net	(4,797)	(1,066)
Equity in earnings (losses) of investments	(1,688)	1,116
Other expense, net	68,526	1,027
Income (loss) before income taxes	81,712	3,000
Income tax expense	5,263	1,201
Net income (loss)	76,449	1,799
Net income (loss) attributable to noncontrolling interests	(470)	76
Net income (loss) attributable to ION	75,979	1,875
Preferred stock dividends	0	338
Net income (loss) applicable to common shares	$ 75,979	$ 1,537
Net income (loss) per share:
Basic, in dollars per share	$ 0.46	$ 0.01
Diluted, in dollars per share	$ 0.46	$ 0.01
Weighted average number of common shares outstanding:
Basic, in shares	163,847	156,465
Diluted, in shares	164,061	157,315

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Net Income per Share

3 Months Ended

Mar. 31, 2014

Earnings Per Share [Abstract]

Net Income per Share

Net Income per Share

Basic net income per common share is computed by dividing net income applicable to common shares by the weighted average number of common shares outstanding during the period. Diluted net income per common share is determined based on the assumption that dilutive restricted stock and restricted stock unit awards have vested and outstanding dilutive stock options have been exercised and the aggregate proceeds were used to reacquire common stock using the average price of such common stock for the period. The total number of shares issued or reserved for future issuance under outstanding stock options at March 31, 2014 and 2013 was 9,660,100 and 7,717,937, respectively, and the total number of shares of restricted stock and shares reserved for restricted stock units outstanding at March 31, 2014 and 2013 was 1,237,123 and 1,034,280, respectively.

Prior to September 30, 2013, there were 27,000 shares outstanding of the Company’s Series D Cumulative Convertible Preferred Stock (“Series D Preferred Stock”). On September 30, 2013, the holder converted all of the outstanding shares of Series D Preferred Stock into 6,065,075 shares of common stock. The then-outstanding shares of Series D Preferred Stock were anti-dilutive for the three months ended March 31, 2013.

The following table summarizes the computation of basic and diluted net income per common share (in thousands, except per share amounts):

	Three Months Ended March 31,
	2014		2013
Net income applicable to common shares	$	75,979	$	1,537
Weighted average number of common shares outstanding	163,847		156,465
Effect of dilutive stock awards	214		850
Weighted average number of diluted common shares outstanding	164,061		157,315
Basic net income per share	$	0.46	$	0.01
Diluted net income per share	$	0.46	$	0.01

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Long-term Debt

3 Months Ended

Mar. 31, 2014

Debt Disclosure [Abstract]

Long-term Debt

Long-term Debt

Obligations (in thousands)	March 31, 2014			December 31, 2013
Senior secured second-priority notes	$	175,000		$	175,000
Revolving line of credit	50,000			35,000
Equipment capital leases	9,091			8,651
Brazil bank debt	5,649			—
Facility lease obligation	1,273			1,501
Total	241,013			220,152
Current portion of long-term debt and lease obligations	(60,551		)	(5,906		)
Non-current portion of long-term debt and lease obligations	$	180,462		$	214,246

Senior Secured Second-Priority Notes

On May 13, 2013, the Company sold $175.0 million aggregate principal amount of 8.125% Senior Secured Second-Priority Notes due 2018 (“Notes”) in a private offering pursuant to an Indenture dated as of May 13, 2013. The Notes are senior secured second-priority obligations of the Company, are guaranteed by certain of the Company’s U.S. subsidiaries, and mature on May 15, 2018. Interest on the Notes accrues at the rate of 8.125% per annum and will be payable semiannually in arrears on May 15 and November 15 of each year during their term. On April 10, 2014, the Company commenced a registered exchange offer pursuant to which holders of the privately placed Notes that have not been registered under the Securities Act of 1933, as amended (the “Securities Act”), may exchange their Notes for a like principal amount of Notes that have been registered under the Securities Act. Unless extended, the exchange offer will expire at 5:00 p.m., New York City time, on May 9, 2014.

On or after May 15, 2015, the Company may on one or more occasions redeem all or a part of the Notes at the redemption prices set forth below, plus accrued and unpaid interest and special interest, if any, on the Notes redeemed during the 12-month period beginning on May 15th of the years indicated below:

Date	Percentage
2015	104.063%
2016	102.031%
2017 and thereafter	100.000%

The Notes are initially jointly and severally guaranteed on a senior secured basis by each of the Company’s current material U.S. subsidiaries: GX Technology Corporation, ION Exploration Production (U.S.A.), Inc. and I/O Marine Systems, Inc. (the “Notes Guarantors”). The Notes and the guarantees are secured, subject to certain exceptions and permitted liens, by second-priority liens on substantially all of the assets that secure the indebtedness under the Company’s senior first-priority secured credit facility with China Merchants Bank Co., Ltd., New York Branch (“CMB”) as administrative agent and lender under the facility (see “— Revolving Line of Credit” below). The indebtedness under the Notes is effectively junior to the Company’s obligations under the senior secured credit facility to the extent of the value of the collateral securing the facility, and to any other indebtedness secured on a first-priority basis to the extent of the value of the Company’s assets subject to those first-priority security interests.

The Notes contain certain covenants that, among other things, limit the Company’s ability and the ability of its restricted subsidiaries. These and other restrictive covenants contained in the Indenture are subject to important exceptions and qualifications. All of the Company’s subsidiaries are currently restricted subsidiaries. As of March 31, 2014, the Company was in compliance with these covenants.

In connection with the offering of the Notes, the Company entered into a consent agreement with CMB, as administrative agent and lender under the Company’s senior secured credit facility. See “— Revolving Line of Credit” below.

In connection with the issuance of the Notes, the Company and the Notes Guarantors entered into a second lien intercreditor agreement dated as of May 13, 2013 (the “Intercreditor Agreement”) with, among others, CMB, as administrative agent, first lien representative for the first lien secured parties and collateral agent for the first lien secured parties, the trustee under the Indenture and the collateral agent for the second lien secured parties. The Intercreditor Agreement provides, among other things, that the liens on the collateral securing the Notes and related obligations will be junior and subordinate in all respects to the liens on the collateral securing the Company’s senior secured credit facility and related obligations.

Revolving Line of Credit

On May 29, 2012, the Company amended the terms of its senior secured credit facility (the “Credit Facility”) with CMB, as administrative agent and lender. The First Amendment to the Credit Agreement and Loan Documents (the “First Amendment”) modified certain provisions of the Company’s senior credit agreement with CMB that it had entered into on March 25, 2010. The maturity date of any outstanding debt under the Credit Facility is March 24, 2015; therefore the outstanding balance of $50.0 million as of March 31, 2014 has been classified as a current obligation.

As amended by the First Amendment, the Credit Facility provides that the Company may make revolving credit borrowings in U.S. Dollars, Euros, British Pounds Sterling or Canadian Dollars up to an amount not to exceed the U.S. Dollar equivalent of $175.0 million. The Company also agreed that no additional borrowings may be made at any time at which the outstanding indebtedness under the revolving line of credit (principal, accrued interest and fees) exceeds the U.S. Dollar equivalent of $175.0 million. The First Amendment eliminated sub-facility limits under the Credit Facility.

The Company’s obligations under the Credit Facility continue to be guaranteed by certain of its material U.S. subsidiaries that remain as parties to the Credit Facility. In addition, INOVA Geophysical continues to provide a bank stand-by letter of credit as credit support for the Company’s obligations under the Credit Facility. The Company also entered into a credit support agreement with INOVA Geophysical whereby the Company has agreed to indemnify INOVA Geophysical for any and all losses sustained by INOVA Geophysical that arise out of INOVA Geophysical’s guarantee.

As amended by the First Amendment, the interest rates per annum on borrowings under the Credit Facility are, at the Company’s option:

• an alternate base rate equal to the sum of (i) the greatest of (a) the prime rate of CMB, (b) a federal funds effective rate plus 0.50%, or (c) an adjusted LIBOR-based rate plus 1.0%, and (ii) an applicable interest margin of 1.4% (reduced from 2.5%); or

• for eurodollar borrowings and borrowings in Euros, Pounds Sterling or Canadian Dollars, the sum of (i) an adjusted LIBOR-based rate, and (ii) an applicable interest margin of 2.4% (reduced from 3.5%).

As of March 31, 2014, the $50.0 million in outstanding revolving loan indebtedness under the Credit Facility accrued interest at a rate of 2.56% per annum.

The Credit Facility requires compliance with certain financial covenants, including the following:

• maintain a minimum fixed charge coverage ratio, as defined, in an amount equal to at least 1.125 to 1;

• not exceed a maximum leverage ratio, as defined, of 3.25 to 1; and

• maintain a minimum tangible net worth of at least 60% of the Company’s tangible net worth as of March 31, 2010, as defined.

As of March 31, 2014, the Company was in compliance with these financial covenants.

Brazil Bank Debt

In connection with the Company’s acquisition of a controlling interest in OceanGeo, OceanGeo’s existing debt was consolidated into the Company’s accounts. As of March 31, 2014, the outstanding amount, denominated in Brazilian Reais, of this debt was $5.6 million, with various maturity dates in 2014 and 2015; the latest being November 3, 2015. Interest on this debt accrues at an average rate of 15.68%.

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Acquisition of Controlling Interest in OceanGeo (Tables)

3 Months Ended

Mar. 31, 2014

Business Combinations [Abstract]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

The following table summarizes the fair value assigned to the assets acquired and liabilities assumed, as well as the noncontrolling interest, at the acquisition date (in thousands):

Estimated Fair Value of Assets Acquired and Liabilities Assumed:
Cash and cash equivalents	$	609
Accounts receivable	9,247
Prepaid expenses and other current assets	1,433
Multi-client data library	3,876
Property, plant, equipment and seismic rental equipment, net	14,598
Other assets	2,227
Total identifiable assets	31,990
Accounts payable and accrued liabilities	(13,464		)
Bank loans	(6,135		)
Other liabilities	(1,026		)
Net assets	11,365
Noncontrolling interest	(3,410		)
Total consideration	$	7,955

Business Acquisition, Pro Forma Information

Amounts presented below are in thousands, except for the per share amounts:

Pro forma Consolidated ION Income Statement Information	Three Months Ended March 31,
	2014		2013
Net revenues	$	153,882	$	147,706
Income from operations	$	23,747	$	4,291
Net income	$	77,968	$	4,010
Net income attributable to ION	$	76,821	$	3,164
Basic net income per common share	$	0.47	$	0.02
Diluted net income per common share	$	0.47	$	0.02

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Related Party Transactions

3 Months Ended

Mar. 31, 2014

Related Party Transactions [Abstract]

Related Party Transactions

Related Party Transactions

BGP Inc. (“BGP”) owned approximately 14.5% of the Company’s outstanding common stock as of March 31, 2014. For the three months ended March 31, 2014 and 2013, the Company recorded revenues from BGP of $2.0 million and $0.9 million, respectively. Total receivables due from BGP were $2.4 million at March 31, 2014.

In July 2013, the Company agreed to lend up to $10.0 million to INOVA Geophysical, and received a promissory note issued by INOVA Geophysical to the order of the Company, which was originally scheduled to mature on September 30, 2013. The maturity date of the promissory note has since been extended to June 30, 2014. The loan was made by the Company to support certain short-term working capital needs of INOVA Geophysical. The indebtedness under the note accrues interest at an annual rate equal to the London Interbank Offered Rate plus 650 basis points. In 2013, the Company advanced the full principal amount of $10.0 million to INOVA Geophysical under the promissory note. INOVA Geophysical has repaid a total of $6.0 million, of which $4.0 million remains outstanding at March 31, 2014.

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Details of Selected Balance Sheet Accounts Details of Selected Balance Sheet Accounts

3 Months Ended

Mar. 31, 2014

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Details of Selected Balance Sheet Accounts

Details of Selected Balance Sheet Accounts

Inventories

A summary of inventories is as follows (in thousands):	March 31, 2014			December 31, 2013
Raw materials and subassemblies	$	56,252		$	54,168
Work-in-process	2,428			2,297
Finished goods	27,285			33,263
Reserve for excess and obsolete inventories	(31,256		)	(32,555		)
Total	$	54,709		$	57,173

Other Long-term Liabilities

A summary of other long-term liabilities is as follows (in thousands):	March 31, 2014		December 31, 2013
Accrual for loss contingency related to legal proceedings (Note 8)	$	123,770	$	193,327
Facility restructuring accrual	4,818		4,837
Other long-term liabilities	14,399		12,438
Total	$	142,987	$	210,602

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Income Taxes

3 Months Ended

Mar. 31, 2014

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The Company maintains a valuation allowance for substantially all of its deferred tax assets. The valuation allowance is calculated in accordance with the provisions of the Financial Accounting Standards Board’s (“FASB”) Accounting Standard Codification Topic 740 “Income Taxes,” which requires that a valuation allowance be established or maintained when it is “more likely than not” that all or a portion of deferred tax assets will not be realized. In the event the Company’s expectations of future operating results change, the valuation allowance may need to be adjusted upward or downward. As of March 31, 2014, the Company’s unreserved U.S. deferred tax assets totaled $3.8 million. These existing unreserved deferred tax assets are currently considered to be “more likely than not” realized.

The Company’s effective tax rates for the three months ended March 31, 2014 and 2013 were 6.4% and 40.0%, respectively. The Company’s effective tax rate for the first quarter of 2014 was positively impacted by the change in valuation allowance related to the reduction of the legal contingency reserve, offset by the impact of pre-tax losses of OceanGeo within certain jurisdictions for which it could not recognize a tax benefit to offset its tax expenses. Excluding the change in valuation allowance, the Company’s effective tax rate for the first quarter of 2014 was 43.3%.

The Company has approximately $2.2 million of unrecognized tax benefits and does not expect to recognize significant increases in unrecognized tax benefits during the next 12-month period. Interest and penalties, if any, related to unrecognized tax benefits are recorded in income tax expense.

As of March 31, 2014, the Company’s U.S. federal tax returns for 2007 and subsequent years remain subject to examination by tax authorities. The Company is no longer subject to U.S. Internal Revenue Service (“IRS”) examination for periods prior to 2007, although carryforward attributes that were generated prior to 2007 may still be adjusted upon examination by the IRS if they either have been or will be used in an open year. In the Company’s foreign tax jurisdictions, tax returns for 2010 and subsequent years generally remain open to examination.

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Litigation

3 Months Ended

Mar. 31, 2014

Commitments and Contingencies Disclosure [Abstract]

Litigation

Litigation

WesternGeco

In June 2009, WesternGeco L.L.C. (“WesternGeco”) filed a lawsuit against the Company in the United States District Court for the Southern District of Texas, Houston Division. In the lawsuit, styled WesternGeco L.L.C. v. ION Geophysical Corporation, WesternGeco alleged that the Company had infringed several method and apparatus claims contained in four of its United States patents regarding marine seismic streamer steering devices. WesternGeco sought unspecified monetary damages and an injunction prohibiting the Company from making, using, selling, offering for sale or supplying any infringing products in the United States.

In June 2010, WesternGeco filed a lawsuit against various subsidiaries and affiliates of Fugro N.V. (“Fugro”), one of the Company’s seismic contractor customers, accusing Fugro of infringing the same United States patents regarding marine seismic streamer steering devices by planning to use certain equipment purchased from the Company on a survey located outside of U.S. territorial waters. The court approved the consolidation of the Fugro case with the case against the Company. Fugro filed a motion to dismiss the lawsuit, and in March 2011, the presiding judge granted Fugro’s motion to dismiss in part, on the basis that the alleged activities of Fugro would occur more than 12 miles from the U.S. coast and therefore are not actionable under U.S. patent infringement law. In response to a Motion for Summary Judgment filed jointly by the Company and Fugro, the Court ruled in April 2012 that the Company did not directly infringe WesternGeco’s method patent claims. In a pre-trial ruling on June 29, 2012, the Court ruled that, if a particular patent claim of WesternGeco was held to be valid and enforceable at the trial, the Company’s supplying of its DigiFIN^® lateral streamer control units and related software from the United States to its customers overseas with an intention for the customers to combine DigiFIN and such related software with other required components of the patent claim, would infringe one claim in one of WesternGeco’s asserted patents, U.S. Patent No. 7,293,520.

The trial began on July 23, 2012. During the trial, Fugro settled all claims asserted against it by WesternGeco and obtained a global license from WesternGeco. A verdict was returned by the jury on August 16, 2012, finding that the Company willfully infringed the claims contained in the four patents by supplying DigiFIN and the related software from the United States and awarded WesternGeco the sum of $105.9 million in damages, consisting of $12.5 million in reasonable royalty and $93.4 million in lost profits.

In September 2012, the Company filed motions with the trial court to overturn all or portions of the verdict. In June 2013, the presiding judge entered a Memorandum and Order rejecting the jury’s finding of willfulness and denying WesternGeco’s motions for willfulness and enhanced damages, but also denying the Company’s post-verdict motions that challenged the jury’s infringement findings and the damages amount. In the Memorandum and Order, the judge also stated that he would approve WesternGeco’s motion for a permanent injunction and that WesternGeco is entitled to be awarded supplemental damages for the additional DigiFIN units that were supplied from the United States before and after trial that were not included in the jury verdict due to the timing of the trial. On October 24, 2013, the judge entered another Memorandum and Order, ruling on the number of DigiFIN units that are subject to supplemental damages and also ruling that the supplemental damages applicable to the additional units should be calculated by adding together the jury’s previous reasonable royalty and lost profits damages awards per unit, resulting in supplemental damages of $73.1 million. The October 2013 Memorandum and Order also concluded that the Company’s infringement involving the supplemental units was not willful and that WesternGeco was not entitled to receive enhanced damages.

On April 30, 2014, the judge entered another Order, ruling that lost profits should not have been included in the calculation of supplemental damages in the October 2013 Memorandum and Order and reducing the supplemental damages award in the case from $73.1 million to $9.4 million. In the Order, the judge also further reduced the damages award in the case by $3.0 million to reflect a settlement and license that WesternGeco entered into with a customer of the Company that had purchased and used DigiFIN units that were also included in the damages amounts awarded against the Company. After accounting for the above court-ordered reductions, the total damages award in the case now consists of approximately $123.8 million, consisting of adjusted jury verdict and supplemental damages, court costs and estimates of prejudgment interest.

The Company intends to appeal the judgment to the United States Court of Appeals for the Federal Circuit. WesternGeco also has the right to elect to appeal the final judgment.

The trial court has ruled that it will also enter a permanent injunction against the Company. As of the filing date of this Quarterly Report on Form 10-Q, the Court had not issued the definitive terms of the permanent injunction. Until the permanent injunction is entered, the final terms of the injunction cannot be known for certain, but it is likely that the permanent injunction will prohibit the Company from supplying its DigiFIN units, two parts that are unique to the DigiFIN product and related software from the United States to its customers overseas with an intention for the customers to combine DigiFIN and the software with other required components of the patent claims. The Company has conducted its business in compliance with the Court’s orders in the case, and the Company has reorganized its operations such that it no longer supplies DigiFIN units, the unique DigiFIN parts or the related software from the United States.

Based on the Company’s analysis after the trial court’s Memorandum and Order in June 2013 denying the Company’s post-verdict motions that challenged the jury’s infringement findings and the damages amount, the Company increased its loss contingency accrual related to this case from $10.0 million to $120.0 million, consisting of jury verdict damages, court costs, and estimates of prejudgment interest and supplemental damages. Based on the Company’s analysis after the trial court’s Memorandum and Order in October 2013 awarding supplemental damages, the Company further increased its loss contingency accrual related to this case from $120.0 million to $193.3 million at December 31, 2013, consisting of jury verdict damages, supplemental damages, court costs, and estimates of prejudgment interest. As a result of the Order entered in April 2014, the Company reversed its prior loss contingency accrual by approximately $70.0 million, resulting in a loss contingency accrual of $123.8 million at March 31, 2014. Additional interest will continue to accrue until this legal matter is fully resolved.

The Company’s assessment of its potential loss contingency may change in the future due to developments at the trial court or appellate court and other events, such as changes in applicable law, and such reassessment could lead to the determination that no loss contingency is probable or that a greater or lesser loss contingency is probable. Any such reassessment could have a material effect on the Company’s financial condition or results of operations.

As stated above, the Company intends to appeal the trial court judgment to the United States Court of Appeals for the Federal Circuit. In order to stay the judgment during the appeal, the Company will be required to post an appeal bond with the trial court. The amount of the appeal bond is in the discretion of the trial court judge and could be required to be up to the full amount of damages entered in the judgment, plus court costs and interest; however, in the Order entered in April 2014, the judge agreed that the appeal bond amount required to be posted by the Company will be $120.0 million. The Company has arranged with sureties to post an appeal bond on its behalf. The terms of the appeal bond arrangements provide the sureties the contractual right for as long as the bond is outstanding to require the Company to post cash collateral for up to the full amount of the bond; however, as a result of the reduced damages amount, the sureties have informed the Company that they will not require cash collateral upon the posting of the appeal bond. Until an appeal bond is posted, the terms applicable to the appeal bond, including collateral required to secure the bond, are not final.

If the sureties exercise their right to require collateral while the appeal bond is outstanding, the Company would intend to utilize a combination of cash on hand and undrawn balances available under its revolving line of credit. If the Company is required to collateralize the full amount of the bond, the Company might also seek additional debt and/or equity financing. The collateralization of the full amount of the bond could have an adverse effect on the Company’s liquidity. Any requirements that the Company collateralize the appeal bond will reduce its liquidity and may reduce the borrowings otherwise available under its Credit Facility. The current maturity date of any outstanding debt under the Company’s Credit Facility is March 2015. No assurances can be made whether the Company’s efforts to raise additional cash would be successful and, if so, on what terms and conditions, and at what cost the Company might be able to secure any such financing.

If the Company is unable to post the appeal bond, the Company will be unable to stay enforcement of the trial court judgment during the appeal of the judgment. The Company is unable to predict the timing of the posting of the required appeal bond.

Other

The Company has been named in various other lawsuits or threatened actions that are incidental to its ordinary business. Litigation is inherently unpredictable. Any claims against the Company, whether meritorious or not, could be time-consuming, cause the Company to incur costs and expenses, require significant amounts of management time and result in the diversion of significant operational resources. The results of these lawsuits and actions cannot be predicted with certainty. Management currently believes that the ultimate resolution of these matters will not have a material adverse impact on the financial condition, results of operations or liquidity of the Company.

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Accumulated Other Comprehensive Income (Loss)

3 Months Ended

Mar. 31, 2014

Equity [Abstract]

Accumulated Other Comprehensive Income (Loss)

Accumulated Other Comprehensive Income (Loss)

A summary of changes in accumulated other comprehensive income (loss) by component is as follows (in thousands):

	Foreign currency translation adjustments			Equity interest in investees’ other comprehensive income (loss)			Other changes in other comprehensive income (loss)			Total
Accumulated other comprehensive income (loss) at December 31, 2013	$	(11,923	)	$	841		$	(56	)	$	(11,138	)
Net current-period other comprehensive income (loss)	486			(1,173		)	26			(661		)
Accumulated other comprehensive income (loss) at March 31, 2014	$	(11,437	)	$	(332	)	$	(30	)	$	(11,799	)

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Acquisition of Controlling Interest in OceanGeo - Narrative (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 OceanGeo [Member]	Jan. 31, 2014 OceanGeo [Member]	Dec. 31, 2013 OceanGeo [Member]	Oct. 31, 2013 OceanGeo [Member]	Oct. 31, 2013 Optional Increase in Ownership [Member] OceanGeo [Member]
Business Acquisition [Line Items]
Percentage in equity interest prior to acquisition					30.00%
Ownership percentage interest				70.00%			70.00%
Loan made to equity method investee						$ 25,000,000
Amount drawn on credit facility by investee				3,700,000	15,300,000
Acquisition related costs			1,300,000
Revenues	144,698,000	129,737,000	4,200,000
Income (loss) from operations	$ 19,671,000	$ 1,923,000	$ 20,600,000

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Supplemental Cash Flow Information and Non-Cash Activity (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Supplemental Cash Flow Elements [Abstract]
Purchases of computer equipment financed through capital leases	$ 1,952	$ 0
Transfer of inventory to seismic rental equipment	$ 2,308	$ 134

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Condensed Consolidating Financial Information

3 Months Ended

Mar. 31, 2014

Condensed Financial Information of Parent Company Only Disclosure [Abstract]

Condensed Consolidating Financial Information

Condensed Consolidating Financial Information

In 2013, the Company sold $175.0 million of its 8.125% Senior Secured Second-Priority Notes due 2018. The Notes were issued by ION Geophysical Corporation and are guaranteed by the Company’s current material U.S. subsidiaries: GX Technology Corporation, ION Exploration Products (U.S.A.), Inc. and I/O Marine Systems, Inc. (“the Guarantors”), which are 100-percent-owned subsidiaries. The Guarantors have fully and unconditionally guaranteed the payment obligations of ION Geophysical Corporation with respect to these debt securities. The following condensed consolidating financial information presents the results of operations, financial position and cash flows for:

• ION Geophysical Corporation and the Guarantors (in each case, reflecting investments in subsidiaries utilizing the equity method of accounting).

• All other subsidiaries of ION Geophysical Corporation that are not Guarantors.

• The consolidating adjustments necessary to present ION Geophysical Corporation’s results on a consolidated basis.

This condensed consolidating financial information should be read in conjunction with the accompanying consolidated financial statements and notes.

	March 31, 2014
Balance Sheet	ION Geophysical Corporation			The Guarantors			All Other Subsidiaries			Consolidating Adjustments			Total Consolidated
	(In thousands)
ASSETS
Current assets:
Cash and cash equivalents	$	154,845		$	1,539		$	40,922		$	—		$	197,306
Accounts receivable, net	2,532			46,308			49,391			—			98,231
Unbilled receivables	—			55,168			13,284			—			68,452
Inventories	—			5,658			49,051			—			54,709
Prepaid expenses and other current assets	12,087			4,897			10,391			(1,770		)	25,605
Total current assets	169,464			113,570			163,039			(1,770		)	444,303
Deferred income tax asset	6,500			6,675			758			406			14,339
Property, plant, equipment and seismic rental equipment, net	6,152			29,977			23,682			—			59,811
Multi-client data library, net	—			213,272			29,811			—			243,083
Equity method investments	47,466			—			—			—			47,466
Investment in subsidiaries	785,917			256,637			—			(1,042,554		)	—
Goodwill	—			26,984			29,127			—			56,111
Intangible assets, net	—			7,747			2,819			—			10,566
Intercompany receivables	50,557			—			—			(50,557		)	—
Other assets	13,845			46			24,249			(22,500		)	15,640
Total assets	$	1,079,901		$	654,908		$	273,485		$	(1,116,975	)	$	891,319
LIABILITIES AND EQUITY
Current liabilities:
Current maturities of long-term debt	$	50,000		$	4,794		$	5,757		$	—		$	60,551
Accounts payable	2,001			13,078			23,575			—			38,654
Accrued expenses	15,888			41,532			16,133			(1,082		)	72,471
Accrued multi-client data library royalties	—			37,648			615			—			38,263
Deferred revenue	—			12,689			3,341			—			16,030
Total current liabilities	67,889			109,741			49,421			(1,082		)	225,969
Long-term debt, net of current maturities	175,000			4,073			1,389			—			180,462
Intercompany payables	467,223			34,145			16,412			(517,780		)	—
Other long-term liabilities	33,957			121,617			10,195			(22,782		)	142,987
Total liabilities	744,069			269,576			77,417			(541,644		)	549,418
Redeemable noncontrolling interests	—			—			5,552			—			5,552
Stockholders’ equity:
Common stock	1,640			290,460			22,362			(312,822		)	1,640
Additional paid-in capital	882,892			175,005			235,994			(410,999		)	882,892
Accumulated earnings (deficit)	(530,178		)	324,015			(69		)	(323,946		)	(530,178		)
Accumulated other comprehensive income (loss)	(11,799		)	6,217			(11,430		)	5,213			(11,799		)
Due from ION Geophysical Corporation	—			(410,365		)	(56,858		)	467,223			—
Treasury stock	(6,565		)	—			—			—			(6,565		)
Total stockholders’ equity	335,990			385,332			189,999			(575,331		)	335,990
Noncontrolling interests	(158		)	—			517			—			359
Total equity	335,832			385,332			190,516			(575,331		)	336,349
Total liabilities and equity	$	1,079,901		$	654,908		$	273,485		$	(1,116,975	)	$	891,319

	December 31, 2013
Balance Sheet	ION Geophysical Corporation			The Guarantors			All Other Subsidiaries			Consolidating Adjustments			Total Consolidated
	(In thousands)
ASSETS
Current assets:
Cash and cash equivalents	$	124,701		$	—		$	23,355		$	—		$	148,056
Accounts receivable, net	1,874			99,547			48,027			—			149,448
Unbilled receivables	—			33,490			15,978			—			49,468
Inventories	—			6,595			50,578			—			57,173
Prepaid expenses and other current assets	12,888			5,030			7,438			(584		)	24,772
Total current assets	139,463			144,662			145,376			(584		)	428,917
Deferred income tax asset	6,513			6,960			489			688			14,650
Property, plant, equipment and seismic rental equipment, net	6,440			29,845			10,399			—			46,684
Multi-client data library, net	—			212,572			26,212			—			238,784
Equity method investments	51,065			—			2,800			—			53,865
Investment in subsidiaries	699,695			248,482			—			(948,177		)	—
Goodwill	—			26,984			28,892			—			55,876
Intangible assets, net	—			8,246			3,001			—			11,247
Intercompany receivables	8,313			13,419			—			(21,732		)	—
Other assets	14,315			56			24,262			(23,985		)	14,648
Total assets	$	925,804		$	691,226		$	241,431		$	(993,790	)	$	864,671
LIABILITIES AND EQUITY
Current liabilities:
Current maturities of long-term debt	$	—		$	4,716		$	1,190		$	—		$	5,906
Accounts payable	3,515			11,741			7,364			34			22,654
Accrued expenses	16,652			54,250			13,392			64			84,358
Accrued multi-client data library royalties	—			45,921			539			—			46,460
Deferred revenue	—			16,387			4,295			—			20,682
Total current liabilities	20,167			133,015			26,780			98			180,060
Long-term debt, net of current maturities	210,000			3,655			591			—			214,246
Intercompany payables	426,134			—			21,732			(447,866		)	—
Other long-term liabilities	11,757			214,211			8,637			(24,003		)	210,602
Total liabilities	668,058			350,881			57,740			(471,771		)	604,908
Redeemable noncontrolling interests	—			—			1,878			—			1,878
Stockholders’ equity:
Common stock	1,637			290,460			19,138			(309,598		)	1,637
Additional paid-in capital	879,969			180,700			235,381			(416,081		)	879,969
Accumulated earnings (deficit)	(606,157		)	232,186			(4,010		)	(228,176		)	(606,157		)
Accumulated other comprehensive income (loss)	(11,138		)	6,218			(11,920		)	5,702			(11,138		)
Due from ION Geophysical Corporation	—			(369,219		)	(56,915		)	426,134			—
Treasury stock	(6,565		)	—			—			—			(6,565		)
Total stockholders’ equity	257,746			340,345			181,674			(522,019		)	257,746
Noncontrolling interests	—			—			139			—			139
Total equity	257,746			340,345			181,813			(522,019		)	257,885
Total liabilities and equity	$	925,804		$	691,226		$	241,431		$	(993,790	)	$	864,671

	Three Months Ended March 31, 2014
Income Statement	ION Geophysical Corporation			The Guarantors			All Other Subsidiaries			Consolidating Adjustments			Total Consolidated
	(In thousands)
Total net revenues	$	—		$	78,122		$	66,576		$	—		$	144,698
Cost of goods sold	—			43,996			43,848			—			87,844
Gross profit	—			34,126			22,728			—			56,854
Total operating expenses	9,021			15,255			12,907			—			37,183
Income (loss) from operations	(9,021		)	18,871			9,821			—			19,671
Interest expense, net	(4,573		)	(42		)	(182		)	—			(4,797		)
Intercompany interest, net	66			(435		)	369			—			—
Equity in earnings (losses) of investments	89,488			3,856			738			(95,770		)	(1,688		)
Other income (expense)	497			69,911			(1,882		)	—			68,526
Net income before income taxes	76,457			92,161			8,864			(95,770		)	81,712
Income tax expense	478			332			4,453			—			5,263
Net income	75,979			91,829			4,411			(95,770		)	76,449
Net income attributable to noncontrolling interests	—			—			(470		)	—			(470		)
Net income applicable to common shares	$	75,979		$	91,829		$	3,941		$	(95,770	)	$	75,979
Comprehensive net income	$	75,318		$	91,828		$	4,901		$	(96,259	)	$	75,788
Comprehensive income attributable to noncontrolling interest	—			—			(470		)	—			(470		)
Comprehensive net income attributable to ION	$	75,318		$	91,828		$	4,431		$	(96,259	)	$	75,318

	Three Months Ended March 31, 2013
Income Statement	ION Geophysical Corporation			The Guarantors			All Other Subsidiaries			Consolidating Adjustments			Total Consolidated
	(In thousands)
Total net revenues	$	—		$	73,922		$	55,815		$	—		$	129,737
Cost of goods sold	—			60,183			34,597			—			94,780
Gross profit	—			13,739			21,218			—			34,957
Total operating expenses	8,030			16,357			8,647			—			33,034
Income (loss) from operations	(8,030		)	(2,618		)	12,571			—			1,923
Interest expense, net	(1,025		)	22			(63		)	—			(1,066		)
Intercompany interest, net	82			(269		)	187			—			—
Equity in earnings (losses) of investments	5,837			6,634			(735		)	(10,620		)	1,116
Other income	340			8			679			—			1,027
Net income (loss) before income taxes	(2,796		)	3,777			12,639			(10,620		)	3,000
Income tax expense (benefit)	(4,671		)	(768		)	6,640			—			1,201
Net income	1,875			4,545			5,999			(10,620		)	1,799
Net loss attributable to noncontrolling interests	—			—			76			—			76
Net income attributable to ION	1,875			4,545			6,075			(10,620		)	1,875
Preferred stock dividends	338			—			—			—			338
Net income applicable to common shares	$	1,537		$	4,545		$	6,075		$	(10,620	)	$	1,537
Comprehensive net income (loss)	$	(1,781	)	$	4,546		$	2,275		$	(6,897	)	$	(1,857	)
Comprehensive loss attributable to noncontrolling interest	—			—			76			—			76
Comprehensive net income (loss) attributable to ION	$	(1,781	)	$	4,546		$	2,351		$	(6,897	)	$	(1,781	)

	Three Months Ended March 31, 2014
Statement of Cash Flows	ION Geophysical Corporation			The Guarantors			All Other Subsidiaries			Consolidating Adjustments		Total Consolidated
	(In thousands)
Cash flows from operating activities:
Net cash provided by operating activities	$	15,105		$	19,989		$	27,588		$	—	$	62,682
Cash flows from investing activities:
Cash invested in multi-client data library	—			(22,299		)	(54		)	—		(22,353		)
Purchase of property, plant, equipment and seismic rental equipment	(551		)	(1,230		)	(216		)	—		(1,997		)
Repayment of advances by INOVA Geophysical	1,000			—			—			—		1,000
Investment in and advances to OceanGeo B.V.	—			—			(3,683		)	—		(3,683		)
Cash of OceanGeo B.V. upon acquiring a controlling interest	—			—			609			—		609
Other investing activities	579			26			—			—		605
Net cash provided by (used in) investing activities	1,028			(23,503		)	(3,344		)	—		(25,819		)
Cash flows from financing activities:
Borrowings under revolving line of credit	15,000			—			—			—		15,000
Payments on notes payable and long-term debt	—			(1,365		)	(1,390		)	—		(2,755		)
Intercompany lending	(1,155		)	6,418			(5,263		)	—		—
Proceeds from employee stock purchases and exercise of stock options	246			—			—			—		246
Other financing activities	(80		)	—			—			—		(80		)
Net cash provided by (used in) financing activities	14,011			5,053			(6,653		)	—		12,411
Effect of change in foreign currency exchange rates on cash and cash equivalents	—			—			(24		)	—		(24		)
Net increase in cash and cash equivalents	30,144			1,539			17,567			—		49,250
Cash and cash equivalents at beginning of period	124,701			—			23,355			—		148,056
Cash and cash equivalents at end of period	$	154,845		$	1,539		$	40,922		$	—	$	197,306

	Three Months Ended March 31, 2013
Statement of Cash Flows	ION Geophysical Corporation			The Guarantors			All Other Subsidiaries			Consolidating Adjustments		Total Consolidated
	(In thousands)
Cash flows from operating activities:
Net cash provided by operating activities	$	16,769		$	7,813		$	25,009		$	—	$	49,591
Cash flows from investing activities:
Cash invested in multi-client data library	—			(13,076		)	(15,702		)	—		(28,778		)
Purchase of property, plant, equipment and seismic rental equipment	—			(3,774		)	—			—		(3,774		)
Investment in and advances to OceanGeo B.V.	(8,000		)	—			(1,500		)	—		(9,500		)
Investment in convertible notes	(1,000		)	—			—			—		(1,000		)
Other investing activities	—			—			76			—		76
Net cash used in investing activities	(9,000		)	(16,850		)	(17,126		)	—		(42,976		)
Cash flows from financing activities:
Payments on notes payable and long-term debt	—			(597		)	(251		)	—		(848		)
Intercompany lending	(26,286		)	9,634			16,652			—		—
Payment of preferred dividends	(338		)	—			—			—		(338		)
Proceeds from employee stock purchases and exercise of stock options	716			—			—			—		716
Other financing activities	350			—			—			—		350
Net cash provided by (used in) financing activities	(25,558		)	9,037			16,401			—		(120		)
Effect of change in foreign currency exchange rates on cash and cash equivalents	—			—			(891		)	—		(891		)
Net increase (decrease) in cash and cash equivalents	(17,789		)	—			23,393			—		5,604
Cash and cash equivalents at beginning of period	30,343			—			30,628			—		60,971
Cash and cash equivalents at end of period	$	12,554		$	—		$	54,021		$	—	$	66,575

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Long-term Debt (Tables)

3 Months Ended

Mar. 31, 2014

Debt Disclosure [Abstract]

Obligations

Obligations (in thousands)	March 31, 2014			December 31, 2013
Senior secured second-priority notes	$	175,000		$	175,000
Revolving line of credit	50,000			35,000
Equipment capital leases	9,091			8,651
Brazil bank debt	5,649			—
Facility lease obligation	1,273			1,501
Total	241,013			220,152
Current portion of long-term debt and lease obligations	(60,551		)	(5,906		)
Non-current portion of long-term debt and lease obligations	$	180,462		$	214,246

Debt Instrument Redemption Percentages

On or after May 15, 2015, the Company may on one or more occasions redeem all or a part of the Notes at the redemption prices set forth below, plus accrued and unpaid interest and special interest, if any, on the Notes redeemed during the 12-month period beginning on May 15th of the years indicated below:

Date	Percentage
2015	104.063%
2016	102.031%
2017 and thereafter	100.000%

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Details of Selected Balance Sheet Accounts Long-term Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Other Liabilities Disclosure [Abstract]
Accrual for loss contingency related to legal proceedings (Note 8)	$ 123,770	$ 193,327
Facility restructuring accrual	4,818	4,837
Other long-term liabilities	14,399	12,438
Total	$ 142,987	$ 210,602

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Long-term Debt Obligations (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Obligations
Carrying value of long-term debt	$ 241,013	$ 220,152
Current portion of long-term debt and lease obligations	(60,551)	(5,906)
Long-term debt, net of current maturities	180,462	214,246
Senior secured second-priority notes [Member]
Obligations
Carrying value of long-term debt	175,000	175,000
Revolving line of credit [Member]
Obligations
Carrying value of long-term debt	50,000	35,000
Equipment capital leases [Member]
Obligations
Carrying value of long-term debt	9,091	8,651
Brazil bank debt [Member]
Obligations
Carrying value of long-term debt	5,649	0
Facility lease obligation [Member]
Obligations
Carrying value of long-term debt	$ 1,273	$ 1,501

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Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 76,449	$ 1,799
Other comprehensive income (loss), net of taxes, as appropriate:
Foreign currency translation adjustments	486	(3,641)
Equity interest in investees' other comprehensive loss	(1,173)	(23)
Other changes in other comprehensive income	26	8
Total other comprehensive income (loss), net of taxes	(661)	(3,656)
Comprehensive net income (loss)	75,788	(1,857)
Comprehensive (income) loss attributable to noncontrolling interest	(470)	76
Comprehensive net income (loss) attributable to ION	$ 75,318	$ (1,781)

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Equity Method Investments

3 Months Ended

Mar. 31, 2014

Equity Method Investments and Joint Ventures [Abstract]

Equity Method Investments

Equity Method Investments

The following table reflects the change in the Company’s equity method investments during the three months ended March 31, 2014 (in thousands):

	INOVA Geophysical			OceanGeo			Total
Investments at December 31, 2013	$	51,065		$	2,800		$	53,865
Equity in earnings (losses) of investments	(2,426		)	738			(1,688		)
Advances to OceanGeo (prior to consolidation)	—			3,683			3,683
Acquisition of controlling interest (consolidation) of OceanGeo	—			(7,221		)	(7,221		)
Equity interest in investees' other comprehensive loss	(1,173		)	—			(1,173		)
Investment at March 31, 2014	$	47,466		$	—		$	47,466

INOVA Geophysical — The Company accounts for its 49% interest in INOVA Geophysical as an equity method investment and records its share of earnings and losses of INOVA Geophysical on a one fiscal quarter lag basis. For the three months ended March 31, 2014, the Company recorded its share of losses from INOVA Geophysical of $2.4 million, compared to its share of earnings for the corresponding period in 2013, of $1.9 million. The following table reflects the summarized financial information for INOVA Geophysical for the three months ended December 31, 2013 and 2012 (in thousands):

	Three Months Ended December 31,
	2013			2012
Net revenues	$	40,176		$	59,611
Gross profit	$	4,948		$	12,327
Loss from operations	$	(3,667	)	$	(250	)
Net income (loss)	$	(4,951	)	$	3,742

Related Party Transactions

For information regarding transactions between the Company and its equity method investees, see Note 14 “Related Party Transactions.”

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Other Income, Net (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Other Income and Expenses [Abstract]
Reduction of accrual for loss contingency related to legal proceedings (Note 8)	$ 69,557	$ 0
Other income (expense), net	(1,031)	1,027
Total other income, net	$ 68,526	$ 1,027

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Net Income per Share (Tables)

3 Months Ended

Mar. 31, 2014

Earnings Per Share [Abstract]

Computation of basic and diluted net income per common share

The following table summarizes the computation of basic and diluted net income per common share (in thousands, except per share amounts):

	Three Months Ended March 31,
	2014		2013
Net income applicable to common shares	$	75,979	$	1,537
Weighted average number of common shares outstanding	163,847		156,465
Effect of dilutive stock awards	214		850
Weighted average number of diluted common shares outstanding	164,061		157,315
Basic net income per share	$	0.46	$	0.01
Diluted net income per share	$	0.46	$	0.01

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Equity Method Investments Changes in Equity Method Investments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Schedule of Equity Method Investments [Line Items]
Investment balance, beginning balance	$ 53,865
Equity in earnings (losses) of investments	(1,688)	1,116
Advances to OceanGeo (prior to consolidation)	3,683
Acquisition of controlling interest (consolidation) of OceanGeo	(7,221)
Equity interest in investees' other comprehensive loss	(1,173)
Investment balance, ending balance	47,466
INOVA Geophysical [Member]
Schedule of Equity Method Investments [Line Items]
Investment balance, beginning balance	51,065
Equity in earnings (losses) of investments	(2,426)	1,900
Advances to OceanGeo (prior to consolidation)	0
Acquisition of controlling interest (consolidation) of OceanGeo	0
Equity interest in investees' other comprehensive loss	(1,173)
Investment balance, ending balance	47,466
OceanGeo [Member]
Schedule of Equity Method Investments [Line Items]
Investment balance, beginning balance	2,800
Equity in earnings (losses) of investments	738
Advances to OceanGeo (prior to consolidation)	3,683
Acquisition of controlling interest (consolidation) of OceanGeo	(7,221)
Equity interest in investees' other comprehensive loss	0
Investment balance, ending balance	$ 0

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Recent Accounting Pronouncements

3 Months Ended

Mar. 31, 2014

Accounting Changes and Error Corrections [Abstract]

Recent Accounting Pronouncements

Recent Accounting Pronouncements

Reporting Discontinued Operations — In April 2014, the FASB issued amendments to guidance for reporting discontinued operations and disposals of components of an entity. The amended guidance requires that a disposal representing a strategic shift that has (or will have) a major effect on an entity’s financial results or a business activity classified as held for sale should be reported as discontinued operations. The amendments also expand the disclosure requirements for discontinued operations and add new disclosures for individually significant dispositions that do not qualify as discontinued operations. The amendments are effective prospectively for fiscal years, and interim reporting periods within those years, beginning after December 15, 2014 (early adoption is permitted only for disposals that have not been previously reported). The implementation of the amended guidance is not expected to have a material impact on the Company’s consolidated financial position or results of operations.