INTANGIBLE ASSETS

The Company reviews its purchased intangible assets with finite lives for impairment whenever events or changes in circumstances indicate the carrying value of an asset may not be recoverable. Recoverability of these intangible assets is assessed based on the estimated undiscounted future cash flows expected to result from the use of the asset. If the undiscounted future cash flows are less than the carrying amount, the purchased intangible assets with finite lives are considered to be impaired. The amount of the impairment is measured as the difference between the carrying amount of these assets and the fair value.

The Company's business acquisitions have included the purchase of in-process research and development assets that are not amortizable until the underlying project is complete. The Company assesses that its in-process research and development project is complete when all material research and development costs have been incurred and no significant risks remain. The Company reviews the carrying value of indefinite-lived intangible assets for impairment at least annually during the last quarter of its fiscal year, or more frequently if it believes indicators of impairment exist.

The following table sets forth the components of intangible assets as follows (in thousands):



	June 30, 2014							December 31, 2013
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Developed and core technology	$	7,443	$	(1,399	)	$	6,044	$	7,783	$	(986	)	$	6,797
Customer relationships	3,800		(897		)	2,903		3,800		(552		)	3,248
Trademarks	610		(331		)	279		610		(284		)	326
Non-competition agreements	40		(33		)	7		450		(372		)	78
In-process research and development	1,300		—			1,300		1,300		—			1,300
	$	13,193	$	(2,660	)	$	10,533	$	13,943	$	(2,194	)	$	11,749

The above intangible assets acquired in connection with the Discera acquisition in 2013 of $2.8 million, PhaseLink acquisition in 2012 of $8.3 million, and other acquired intangible assets of $2.1 million are amortized over their estimated useful lives ranging from one to ten years using the straight-line method. Total intangible amortization expense for the three and six months ended June 30, 2014 was $0.4 million and $0.9 million, respectively. Total intangible amortization expense for the three and six months ended June 30, 2013 was $0.3 million and $0.6 million, respectively. The Company expects the completion of development projects for Phaselink and Discera in 2015 and expects to begin amortizing the related in-process research and development in 2015.

The estimated future amortization expense of intangible assets as of June 30, 2014 was as follows (in thousands):



Year Ending December 31,
2014 (remaining six months)	$	758
2015	1,599
2016	1,510
2017	1,281
2018	1,223
Thereafter	4,162
	$	10,533