Intangible Assets

9 Months Ended

Jun. 30, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

8. Intangible Assets

Intangible assets consisted of the following:

	June 30, 2021
(In thousands)	Weighted Average Original Life (Years)		Gross Carrying Amount		Accumulated Amortization			Net
Definite-lived intangible assets:
Customer lists and relationships		8.9	$	13,516	$	(8,724	)	$	4,792
Developed technology		11.5		9,723		(4,913	)		4,810
Patents and other		14.1		3,551		(2,251	)		1,300
Total definite-lived intangible assets				26,790		(15,888	)		10,902
Unamortized intangible assets:
Trademarks and trade names				580		—			580
Total intangible assets			$	27,370	$	(15,888	)	$	11,482

	September 30, 2020
(In thousands)	Weighted Average Original Life (Years)		Gross Carrying Amount		Accumulated Amortization			Net
Definite-lived intangible assets:
Customer lists and relationships		8.9	$	13,356	$	(7,594	)	$	5,762
Developed technology		11.5		9,685		(4,200	)		5,485
Patents and other		14.1		3,551		(2,095	)		1,456
Total definite-lived intangible assets				26,592		(13,889	)		12,703
Unamortized intangible assets:
Trademarks and trade names				580		—			580
Total intangible assets			$	27,172	$	(13,889	)	$	13,283

Intangible asset amortization expense was $0.6 million for both the three months ended June 30, 2021 and 2020 and $1.9 million and $1.8 million for the nine months ended June 30, 2021 and 2020, respectively. Based on the intangible assets in service as of June 30, 2021, estimated amortization expense for the remainder of fiscal 2021 and each of the next five fiscal years is as follows:

(In thousands)
Remainder of 2021	$	620
2022		2,471
2023		1,858
2024		1,764
2025		1,725
2026		757

Future amortization amounts presented above are estimates. Actual future amortization expense may be different as a result of future acquisitions, impairments, changes in amortization periods, foreign currency translation rates, or other factors.