Valuation and Qualifying Accounts

12 Months Ended

Sep. 30, 2012

Valuation and Qualifying Accounts [Abstract]

Valuation and Qualifying Accounts

Schedule II

Geospace Technologies Corporation and Subsidiaries

Valuation and Qualifying Accounts

(In Thousands)

	Balance at Beginning of Period		Charged to Costs And Expenses			Charged to Other Assets		(Deductions) And Additions			Balance at End  of Period
Year ended September 30, 2012
Allowance for doubtful accounts on accounts and notes receivable	$	411	$	118		$	—	$	(249	)	$	280
Year ended September 30, 2011
Allowance for doubtful accounts on accounts and notes receivable		334		128			—		(51	)		411
Year ended September 30, 2010
Allowance for doubtful accounts on accounts and notes receivable		848		(479	)		—		(35	)		334

	Balance at Beginning of Period		Charged to Costs And Expenses		Charged to Other Assets		(Deductions) And Additions			Balance at End  of Period
Year ended September 30, 2012
Inventory obsolescence reserve	$	9,552	$	1,793	$	—	$	(2,021	)	$	9,324
Year ended September 30, 2011
Inventory obsolescence reserve		6,645		4,608		—		(1,701	)		9,552
Year ended September 30, 2010
Inventory obsolescence reserve		4,613		2,872		—		(840	)		6,645