Equity Method Investment in INOVA Geophysical (Tables)

12 Months Ended

Dec. 31, 2012

Equity Method Investments and Joint Ventures [Abstract]

Summary of unaudited financial information for INOVA Geophysical

The following table reflects summarized financial information for INOVA Geophysical as of September 30, 2012 and 2011 and for Fiscal 2012, Fiscal 2011 and Fiscal 2010 (in thousands):

	September 30,
	2012		2011
Current assets	$	138,401	$	104,291
Non-current assets	101,280		108,039
Current liabilities	78,241		38,849
Non-current liabilities	9,290		25,701
Equity	$	152,150	$	147,780

	Fiscal 2012		Fiscal 2011				Fiscal 2010
Total net revenues	$	188,336	$	138,735			$	47,609
Gross profit (loss)	$	39,320	$	5,765		(A)	$	(21,574	)	(B)
Income (loss) from operations	$	3,241	$	(41,836	)		$	(45,423	)
Net income (loss)	$	2,197	$	(46,033	)		$	(48,416	)

(A) Includes approximately $15.7 million of excess inventory charge reflected in INOVA’s third quarter of 2011 and ION’s fourth quarter of 2011.

(B) Includes approximately $19.3 million of excess inventory charge reflected in INOVA’s third quarter of 2010 and ION’s fourth quarter of 2010.