INTANGIBLES AND OTHER ASSETS

Long-lived intangible assets and other assets consisted of the following:



	Dollars in Thousands
	March 31, 2013						December 31, 2012
	Cost		Accumulated Amortization		Net Book Value		Cost		Accumulated Amortization		Net Book Value
Intangibles—acquired technology	$	9,009	$	2,226	$	6,783	$	9,009	$	1,910	$	7,099
Intangibles—assay royalties	1,434		461		973		1,434		410		1,024
Intangibles—third party payor relationships	367		55		312		367		49		318
Intangibles—tradenames and trademarks	824		145		679		824		115		709
Intangibles—customer relationships	652		22		630		652		11		641
Intangibles—covenants not to compete	184		31		153		184		15		169
Patents	975		293		682		929		280		649
Intellectual property	170		20		150		170		15		155
	$	13,615	$	3,253	$	10,362	$	13,569	$	2,805	$	10,764




	Estimated Useful Life
Acquired technology	7-8 years
Assay royalties	7 years
Third party payor relationships	15 years
Tradenames and trademarks	7 years
Customer relationships	15 years
Covenants not to compete	3 years
Patents	Life of the patent
Intellectual property	7 years

Other assets include U.S. security deposits and deferred tax assets, net of applicable valuation allowances.

Amortization expense for intangible assets was $0.5 million and $0.3 million during the three months ended March 31, 2013 and 2012, respectively. Amortization expense for intangible assets is expected to be $1.7 million in each of the years 2013 through 2017.