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Intangible Assets

3 Months Ended

Dec. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

INTANGIBLE ASSETS

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


	Three Months Ended
	December 31, 2021		January 1, 2021
Cost of revenue	$	2,505	$	3,877
Selling, general and administrative	6,782		8,116
Total	$	9,287	$	11,993

Intangible assets consist of the following (in thousands):


	December 31, 2021		October 1, 2021
Acquired technology	$	179,434	$	179,434
Customer relationships	245,870		245,870
Trade name (indefinite-lived)	3,400		3,400
Total	428,704		428,704
Less accumulated amortization	(353,306)		(344,019)
Intangible assets — net	$	75,398	$	84,685

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


	Intangible Assets
	Total Intangible Assets		Acquired Technology		Customer Relationships		Trade Name		Goodwill
Balance as of October 1, 2021	$	428,704	$	179,434	$	245,870	$	3,400	$	314,240

Currency translation adjustment	—		—		—		—		(342)

Balance as of December 31, 2021	$	428,704	$	179,434	$	245,870	$	3,400	$	313,898

As of December 31, 2021, our estimated amortization of our intangible assets in future fiscal years was as follows (in thousands):


	2022 Remaining		2023	2024	2025	2026	Thereafter	Total
Amortization expense	$	24,146	26,048	15,410	3,490	1,644	1,260	$	71,998

Accumulated amortization for acquired technology and customer relationships were $169.9 million and $183.4 million, respectively, as of December 31, 2021, and $167.3 million and $176.7 million, respectively, as of October 1, 2021.