Intangible and Other Assets (Tables)

12 Months Ended

Dec. 31, 2013

Summary of Intangible Assets

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

	Weighted Average Life		2013				2012
			Gross Amount		Accumulated Amortization		Gross Amount		Accumulated Amortization
Intangibles:
Patents and licenses, software and hardware designs		6 years	$	3,620	$	1,461	$	3,955	$	1,684
Developed technology		10 years		2,782		1,182		2,782		904
Customer relationships and non-compete		9 years		2,838		1,428		2,838		1,092
Trademark		Indefinite		833		—		833		—
			$	10,073	$	4,071	$	10,408	$	3,680

Other Assets

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

	2013		2012
Other assets:
Bauxite raw materials:
Inventories	$	9,949	$	13,143
Prepayments		474		474
Other assets		445		220
	$	10,868	$	13,837