Goodwill and Intangible Assets (Tables)

12 Months Ended

Oct. 03, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of changes in carrying amount of goodwill by segment

The changes in the carrying amount of goodwill by segment for fiscal 2020 and 2019 are as follows (in thousands):

	Industrial Lasers & Systems (1)		OEM Laser Sources (2)		Total
Balance as of September 29, 2018	$	342,208	$	100,732	$	442,940
Additions (see Note 4)	3,333		—		3,333
Translation adjustments	(15,260)		(3,912)		(19,172)
Balance as of September 28, 2019	330,281		96,820		427,101
Impairment charges	(327,203)		—		(327,203)
Translation adjustments	(3,078)		4,497		1,419
Balance as of October 3, 2020	$	—	$	101,317	$	101,317

(1) Gross amount of goodwill for our ILS segment was $340.2 million at October 3, 2020 and $343.3 million at September 28, 2019, respectively. At October 3, 2020 and September 28, 2019, the accumulated impairment loss for the ILS reporting unit was $340.2 million and $13.0 million, respectively, reflecting impairment charges in fiscal 2020 and fiscal 2009.

(2) Gross amount of goodwill for our OLS segment was $110.0 million and $105.5 million at October 3, 2020 and September 28, 2019, respectively. At both October 3, 2020 and September 28, 2019, the accumulated impairment loss for the OLS reporting unit was $8.7 million reflecting impairment charges in fiscal 2003 and fiscal 2009.

Schedule of components of amortizable intangible assets

The components of our amortizable intangible assets are as follows (in thousands):

	Fiscal year-end 2020						Fiscal year-end 2019
	Gross Carrying Amount		Accumulated Amortization		Net		Gross Carrying Amount		Accumulated Amortization		Net
Existing technology	$	46,547	$	(37,630)	$	8,917	$	193,704	$	(131,429)	$	62,275
Customer relationships	24,388		(12,923)		11,465		42,083		(21,512)		20,571
Trade name	—		—		—		5,261		(5,138)		123
Production know-how	2,300		(917)		1,383		2,300		(456)		1,844
Total	$	73,235	$	(51,470)	$	21,765	$	243,348	$	(158,535)	$	84,813

Schedule of estimated amortization expense

Estimated amortization expense for the next five fiscal years and all years thereafter are as follows (in thousands):

	Estimated Amortization Expense
2021	$	9,722
2022	3,272
2023	2,703
2024	1,920
2025	1,919
Thereafter	2,229
Total	$	21,765