Intangibles, net and Goodwill

The intangibles, net balance included on the Consolidated Balance Sheet was $111.5 million and $135.2 million at March 31, 2018 and March 25, 2017, respectively.

The following information details the gross carrying amount and accumulated amortization of our intangible assets (in thousands):



	March 31, 2018					March 25, 2017
Intangible Category / Weighted-Average Amortization period (in years)	Gross Amount		Accumulated Amortization			Gross Amount		Accumulated Amortization
Core technology (a)	$	1,390	$	(1,390	)	$	1,390	$	(1,390	)
License agreement (a)	440		(440		)	440		(440		)
Existing technology (6.1)	117,976		(75,048		)	117,975		(53,960		)
In-process research & development (“IPR&D”) (5.8)	97,972		(49,556		)	72,750		(24,245		)
Trademarks and tradename (10.0)	3,037		(2,333		)	3,037		(2,208		)
Customer relationships (10.0)	15,381		(5,732		)	15,381		(4,191		)
Backlog (a)	220		(220		)	220		(220		)
Non-compete agreements (a)	470		(470		)	470		(470		)
Technology licenses (3.0)	28,063		(18,213		)	24,540		(13,891		)
Total	$	264,949	$	(153,402	)	$	236,203	$	(101,015	)


(a)	Intangible assets are fully amortized.

Amortization expense for intangibles in fiscal years 2018, 2017, and 2016 was $53.7 million, $37.4 million, and $35.7 million, respectively. The following table details the estimated aggregate amortization expense for all intangibles owned as of March 31, 2018, for each of the five succeeding fiscal years and in the aggregate thereafter (in thousands):



For the year ended March 30, 2019	$	46,867
For the year ended March 28, 2020	$	27,540
For the year ended March 27, 2021	$	16,094
For the year ended March 26, 2022	$	12,145
For the year ended March 25, 2023	$	6,663
Thereafter	$	2,238

The goodwill balance included on the Consolidated Balance Sheet is $288.7 million and $286.8 million at March 31, 2018 and March 25, 2017, respectively.