Intangible Assets

6 Months Ended

Jun. 30, 2017

4. INTANGIBLE ASSETS

The following table provides a summary of the Company’s intangible assets:



	June 30,				December 31,
	2017				2016
	Cost		Accumulated Amortization		Cost		Accumulated Amortization
Fusion technology	$	9,242	$	3,235	$	9,242	$	2,773
Clamp & probe technology		829		829		829		829
SUBTLE access technology		2,179		760		2,179		538
IPR&D		44,021		—		44,021		—
Total	$	56,271	$	4,824	$	56,271	$	4,140

Amortization expense related to intangible assets with definite lives, which excludes the IPR&D asset, was $342 and $411 for the three months ended June 30, 2017 and 2016, and $684 and $822 for the six months ended June 30, 2017 and 2016.

Future amortization expense related to intangible assets with definite lives is projected as follows:



2017	$	683	July 1, 2017 through December 31, 2017
2018		1,367
2019		1,367
2020		1,235
2021		924
2022 and thereafter		1,850
Total	$	7,426