Basis of Presentation

6 Months Ended

Jun. 30, 2013

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

Basis of Presentation and Restatement

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, 2012 has been derived from the Company’s audited consolidated financial statements at that date. The condensed consolidated balance sheet at June 30, 2013, and the condensed consolidated statements of operations and comprehensive income (loss) for the three and six months ended June 30, 2013 and 2012 and the condensed consolidated statements of cash flows for the six months ended June 30, 2013 and 2012, 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 and six months ended June 30, 2013 are not necessarily indicative of the operating results for a full year or of future operations.

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, 2012 and Amendment No. 1 thereto on Form 10-K/A, which was filed on April 17, 2013 and contains the separate consolidated financial statements of INOVA Geophysical Equipment Limited (“INOVA Geophysical”) for the fiscal year ended December 31, 2012.

Restatement of the Financial Statements for the Three and Six Months Ended June 30, 2013

The condensed consolidated statement of cash flows for the six months ended June 30, 2013 has been restated. In connection with the preparation of the Company’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2013, the Company determined that it had incorrectly presented certain non-cash investments in its multi-client seismic data libraries in its condensed consolidated statements of cash flows. The Company incorrectly included non-cash activity related to the investment in its multi-client seismic data libraries, which resulted in an understatement of its cash provided by operating activities and an understatement of its cash used in investing activities. Management concluded that the impact of the incorrect presentation to periods prior to 2013 was immaterial.

The consolidated financial information contained in this Form 10-Q/A for the six months ended June 30, 2013 reflects the Company’s restated statement of cash flows for this six-month period resulting in changes within cash flows from operating and investing activities, but no change to total cash and cash equivalents. The adjustments reflected in the restatement of the condensed consolidated statement of cash flows are as follows (in thousands):

	Six Months Ended June 30, 2013
	As Reported			Adjustment			As Restated
Statement of Cash Flows:
Accounts payable, accrued expenses and accrued royalties	$	(26,487	)	$	15,096		$	(11,391	)
Net cash provided by operating activities	$	28,281		$	15,096		$	43,377
Investment in multi-client data library	$	(33,503	)	$	(15,096	)	$	(48,599	)
Net cash used in investing activities	$	(49,740	)	$	(15,096	)	$	(64,836	)
Net increase in cash and cash equivalents	$	48,530		$	—		$	48,530
Cash and cash equivalents at end of period	$	109,501		$	—		$	109,501