INTANGIBLES AND OTHER ASSETS

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



	Dollars in Thousands
	June 30, 2015						December 31, 2014
	Cost		Accumulated Amortization		Net Book Value		Cost		Accumulated Amortization		Net Book Value
Intangibles—technology	$	9,009	$	4,406	$	4,603	$	9,009	$	3,995	$	5,014
Intangibles—assay royalties	1,434		922		512		1,434		819		615
Intangibles—third party payor relationships	367		110		257		367		98		269
Intangibles—tradenames and trademarks	824		409		415		824		351		473
Intangibles—customer relationships	652		120		532		652		98		554
Intangibles—covenants not to compete	184		169		15		184		138		46
Patents	1,245		357		888		1,198		385		813
Intellectual property	466		139		327		266		86		180
	$	14,181	$	6,632	$	7,549	$	13,934	$	5,970	$	7,964




	Estimated Useful Life
Technology	7-10 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 $0.4 million and $0.3 million during the three months ended June 30, 2015 and 2014, respectively. Amortization expense for intangible assets was $0.8 million and $0.7 million during the six months ended June 30, 2015 and 2014, respectively. Amortization expense for intangible assets is expected to be $1.4 million, $1.4 million, $1.4 million, $1.1 million and $0.9 million for the years ending December 31, 2015, 2016, 2017, 2018 and 2019, respectively.