Acquired Intangible Assets

12 Months Ended

Mar. 31, 2018

Intangible Assets Disclosure [Abstract]

Acquired Intangible Assets

uired intangible assets as of March 31, 2018 and April 1, 2017 consisted of the following:

(In thousands, except years)	Weighted Average Useful Life (In years)	2018			2017
Developed technology	7.5	$	18,646		$	18,646
Customer relationships	5.3	3,914			3,914
Customer backlog	1.0	1,270			1,270
Trade name and trademarks	3.8	793			793
Fair value of below-market lease (non-current portion)	3.8	310			310
Change of control agreements and non-compete agreements	2.1	160			160
Patents	12.7	2,842			3,465
		27,935			28,558
Less accumulated amortization		(22,766		)	(21,994		)
		$	5,169		$	6,564

Amortization expense for acquired intangible assets has been recorded in the Consolidated Statements of Operations as follows: 

(In thousands)	2018		2017		2016
Cost of sales	$	977	$	1,133	$	1,140
Selling, general and administration	208		209		36
Research, development and engineering	188		188		200
	$	1,373	$	1,530	$	1,376

The estimated amortization expense for acquired intangible assets in future years is as follows (in thousands):

Year	Amortization
2019	$	1,427
2020	1,404
2021	1,245
2022	695
2023	298
Future years	100
	$	5,169