Schedule II-Consolidated Valuation and Qualifying Accounts and Reserves (Tables)

12 Months Ended

Dec. 31, 2012

Consolidated Valuation and Qualifying Accounts and Reserves

	Balance at Beginning of Year		Charges (Reversals) to  Cost or Expenses			Deductions			Balance at End of Year
Year Ended December 31, 2012:
Allowance for doubtful accounts	$	289	$	241		$	(226	)	$	304
Allowance for sales returns		110		—			—			110
Allowance for tax valuation		33,784		(443	)		—			33,341
Year Ended December 31, 2011:
Allowance for doubtful accounts	$	311	$	74		$	(96	)	$	289
Allowance for sales returns		110		—			—			110
Allowance for tax valuation		34,250		(466	)		—			33,784
Year Ended December 31, 2010:
Allowance for doubtful accounts	$	421	$	(80	)	$	(30	)	$	311
Allowance for sales returns		110		—			—			110
Allowance for tax valuation		30,177		4,073			—			34,250