Intangible Assets

9 Months Ended

Jun. 30, 2020

Goodwill And Intangible Assets Disclosure [Abstract]

Intangible Assets

8. Intangible Assets

Intangible assets consist principally of acquired patents and technology, customer lists and relationships, licenses, and trademarks. Intangible asset amortization expense was $0.6 million and $0.7 million for the three months ended June 30, 2020 and 2019, respectively, and $1.8 million and $2.0 million for the nine months ended June 30, 2020 and 2019, respectively.

Intangible assets consisted of the following:

	June 30, 2020
(Dollars in thousands)	Weighted Average Original Life (Years)		Gross Carrying Amount		Accumulated Amortization			Net
Definite-lived intangible assets:
Customer lists and relationships		8.9	$	17,698	$	(11,847	)	$	5,851
Developed technology		11.5		9,565		(3,904	)		5,661
Non-compete		5.0		230		(230	)		—
Patents and other		16.5		2,321		(1,828	)		493
Total definite-lived intangible assets				29,814		(17,809	)		12,005
Unamortized intangible assets:
Trademarks and trade names				580		—			580
Total intangible assets			$	30,394	$	(17,809	)	$	12,585

	September 30, 2019
(Dollars in thousands)	Weighted Average Original Life (Years)		Gross Carrying Amount		Accumulated Amortization			Net
Definite-lived intangible assets:
Customer lists and relationships		8.9	$	17,374	$	(10,661	)	$	6,713
Developed technology		11.5		9,490		(3,196	)		6,294
Non-compete		5.0		230		(196	)		34
Patents and other		16.5		2,321		(1,716	)		605
Total definite-lived intangible assets				29,415		(15,769	)		13,646
Unamortized intangible assets:
Trademarks and trade names				580		—			580
Total intangible assets			$	29,995	$	(15,769	)	$	14,226

Based on the intangible assets in service as of June 30, 2020, estimated amortization expense for the remainder of fiscal 2020 and each of the next five fiscal years is as follows (in thousands):

Remainder of 2020	$	591
2021		2,321
2022		2,281
2023		1,701
2024		1,612
2025		1,575

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.