Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2015

Valuation and Qualifying Accounts [Abstract]

Valuation and Qualifying Accounts

SCHEDULE II

ION GEOPHYSICAL CORPORATION AND SUBSIDIARIES

VALUATION AND QUALIFYING ACCOUNTS

Year Ended December 31, 2013	Balance at Beginning of Year		Charged (Credited) to Costs and Expenses		Deductions			Balance at End of Year
	(In thousands)
Allowances for doubtful accounts	$	6,711	$	12,040	$	(11,529	)	$	7,222
Warranty	1,041		538		(936		)	643
Valuation allowance on deferred tax assets	63,261		88,112		(338		)	151,035
Excess and obsolete inventory	14,239		18,644		(328		)	32,555

Year Ended December 31, 2014	Balance at Beginning of Year		Charged (Credited) to Costs and Expenses		Deductions			Balance at End of Year
	(In thousands)
Allowances for doubtful accounts	$	7,222	$	7,275	$	(6,864	)	$	7,633
Allowances for doubtful notes receivable	—		4,000		—			4,000
Warranty	643		381		(625		)	399
Valuation allowance on deferred tax assets	151,035		54,229		—			205,264
Excess and obsolete inventory	32,555		6,952		(9,703		)	29,804

Year Ended December 31, 2015	Balance at Beginning of Year		Charged (Credited) to Costs and Expenses			Deductions			Balance at End of Year
	(In thousands)
Allowances for doubtful accounts	$	7,633	$	1,841		$	(4,555	)	$	4,919
Allowances for doubtful notes receivable	4,000		—			—			4,000
Warranty	399		13			(288		)	124
Valuation allowance on deferred tax assets	205,264		(11,009		)	—			194,255
Excess and obsolete inventory	29,804		151			(5,480		)	24,475