Intangible Assets

12 Months Ended

Oct. 02, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

INTANGIBLE ASSETS

Amortization expense related to intangible assets is as follows (in thousands):

	Fiscal Years
	2020		2019		2018
Cost of revenue	$	17,462	$	29,847	$	33,429
Selling, general and administrative	32,868		44,872		48,265
Total	$	50,330	$	74,719	$	81,694

Intangible assets consist of the following (in thousands):

	October 2, 2020		September 27, 2019
Acquired technology	$	179,434	$	179,682
Customer relationships	245,870		245,870
Trade name, indefinite lived	3,400		3,400
Total	428,704		428,952
Less accumulated amortization	(297,806)		(247,724)
Intangible assets — net	$	130,898	$	181,228

As of October 2, 2020, our estimated amortization of our intangible assets in future fiscal years, was as follows (in thousands):

	2021		2022	2023	2024	2025	Thereafter
Amortization expense	$	46,213	33,433	26,048	15,410	3,489	2,905

Accumulated amortization for the acquired technology and customer relationships was $152.1 million and $145.7 million, respectively, as of October 2, 2020, and $134.8 million and $112.9 million, respectively, as of September 27, 2019.

A summary of the activity in intangible assets and goodwill follows (in thousands):

	Gross Intangible Assets
	Total Intangibles		Acquired Technology		Customer Relationships		Trade Name		Total Goodwill
Balance as of September 28, 2018	$	773,307	$	251,673	$	518,234	$	3,400	$	314,076
Currency translation adjustments	270		270		—		—		651
Impairments of intangible assets	(344,625)		(72,261)		(272,364)		—		—
Balance as of September 27, 2019	428,952		179,682		245,870		3,400		314,727
Currency translation adjustments	—		—		—		—		285
Disposals of intangible assets	(248)		(248)		—		—		—
Balance as of October 2, 2020	$	428,704	$	179,434	$	245,870	$	3,400	$	315,012

See Note 16 - Impairments, for additional information related to the impairment of our intangible assets.