Goodwill & Other Identifiable Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2013

Goodwill & Other Identifiable Intangible Assets

Schedule of the changes in the carrying amounts of goodwill by segment

	Activated
	Carbon &
	Service			Equipment			Consumer
	Segment			Segment			Segment		Total
Balance as of December 31, 2012	$	20,310		$	6,660		$	60	$	27,030
Restructuring (Note 1)	(419		)	—			—		(419		)
Foreign exchange	(221		)	(36		)	—		(257		)
Balance as of March 31, 2013	$	19,670		$	6,624		$	60	$	26,354

Summary of the Company's identifiable intangible assets

		March 31, 2013
	Weighted Average	Gross Carrying		Foreign			Accumulated			Net Carrying
	Amortization Period	Amount		Exchange			Amortization			Amount
Amortized Intangible Assets:
Patents	20.0 Years	$	676	$	—		$	(559	)	$	117
Customer Relationships	15.9 Years	10,450		(253		)	(8,430		)	1,767
Product Certification	5.4 Years	7,603		(11		)	(4,224		)	3,368
Unpatented Technology	18.4 Years	3,183		—			(2,258		)	925
Licenses	20.0 Years	964		41			(192		)	813
Total	13.0 Years	$	22,876	$	(223	)	$	(15,663	)	$	6,990

		December 31, 2012
	Weighted Average	Gross Carrying		Foreign			Accumulated			Net Carrying
	Amortization Period	Amount		Exchange			Amortization			Amount
Amortized Intangible Assets:
Patents	20.0 Years	$	676	$	—		$	(548	)	$	128
Customer Relationships	15.9 Years	10,450		(223		)	(8,311		)	1,916
Product Certification	5.4 Years	7,369		(3		)	(3,917		)	3,449
Unpatented Technology	18.4 Years	3,183		—			(2,191		)	992
Licenses	20.0 Years	964		119			(180		)	903
Total	13.1 Years	$	22,642	$	(107	)	$	(15,147	)	$	7,388

Schedule of estimated amortization expense

For the year ending December 31:
2014	$	1,948
2015	1,318
2016	1,072
2017	301
2018	141