Intangible and Other Assets (Tables)

12 Months Ended

Dec. 31, 2011

Summary of Intangible Assets

Following is a summary of intangible assets as of December 31:

			2011				2010
	Weighted Average Life		Gross Amount		Accumulated Amortization		Gross Amount		Accumulated Amortization
Intangibles:
Patents and licenses, software and hardware designs		6 years	$	4,225	$	1,661	$	3,562	$	1,144
Developed technology		10 years		2,782		626		2,782		348
Customer relationships and non-compete		9 years		2,838		756		2,838		420
Trademark		Indefinite		833		—		833		—
			$	10,678	$	3,043	$	10,015	$	1,912

Other Assets

Following is a summary of other assets as of December 31:

	2011		2010
Other assets:
Bauxite raw materials:
Inventories	$	23,842	$	—
Prepayments		1,174		1,163
Other assets		826		1,114
	$	25,842	$	2,277