2. Intangible and Other 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

Amortization expense for 2015, 2014 and 2013 was $1,235, $1,313 and $1,173, respectively. Estimated amortization expense for each of the ensuing years through December 31, 2020 is $915, $638, $565, $279 and $17, respectively. During 2015, the Company recognized an impairment of $833, the full value, relating to the Trademark.

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

Bauxite raw materials are used in the production of heavyweight ceramic products. As of December 31, 2015 and 2014, the Company has classified as long-term assets those bauxite raw materials inventories that are not expected to be consumed in production during the upcoming twelve month period. For additional information, refer to Note 4 – Impairment of Long-Lived Assets.