Intangible and Other Assets (Tables)

12 Months Ended

Dec. 31, 2015

Summary of Intangible Assets

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

			2015				2014
	Weighted Average Life		Gross Amount		Accumulated Amortization		Gross Amount		Accumulated Amortization
Intangibles:
Patents and licenses, software and hardware designs		6 years	$	4,754	$	2,839	$	4,222	$	2,171
Developed technology		10 years		2,782		1,739		2,782		1,461
Customer relationships and non-compete		9 years		2,838		2,042		2,838		1,753
Trademark		Indefinite		—		—		833		—
			$	10,374	$	6,620	$	10,675	$	5,385

Other Assets

Following is a summary of other assets as of December 31:	2015		2014
Other assets:
Bauxite raw materials:
Inventories	$	4,145	$	9,404
Other assets		1,962		1,041
	$	6,107	$	10,445