Acquired Intangible Assets

12 Months Ended

Mar. 28, 2015

Intangible Assets Disclosure [Abstract]

Acquired Intangible Assets

Acquired Intangible Assets

Acquired intangible assets as of March 28, 2015 and March 29, 2014 consisted of the following:

(In thousands, except years)	Weighted Average Useful Life (In years)	2015			2014
Developed technology	6.7	$	20,001		$	13,315
Customer relationships	5.6	3,154			3,154
Customer backlog	0.9	1,341			1,250
Trade name and trademarks	3	463			463
Fair value of below-market lease (non-current portion)	3.8	310			310
Change of control agreements	1	100			100
Patents	12.9	3,469			3,427
In-process research and development	Indefinite	—			3,204
		28,838			25,223
Less accumulated amortization		(19,880		)	(18,378		)
Total acquired intangible assets		$	8,958		$	6,845

We performed a review of our acquired intangible assets in the fourth quarter of 2015, including a review for impairment based on certain triggering events and no significant impairments of intangible assets were detected.

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

(In thousands)	2015		2014		2013
Cost of sales	$	1,095	$	2,293	$	4,239
Selling, service and administration	210		212		305
Research, development and engineering	197		480		240
	$	1,502	$	2,985	$	4,784

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

Year	Amortization
2016	$	(1,375	)
2017	(1,208		)
2018	(1,199		)
2019	(1,199		)
2020	(1,147		)
Future years	(2,830		)
	$	(8,958	)