Intangible Assets

6 Months Ended

Mar. 31, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

8. Intangible Assets

Intangible assets consist principally of acquired patents and technology, customer lists and relationships, licenses and trademarks. The Company recorded amortization expense of $0.7 million for both the three month periods ended March 31, 2019 and 2018. The Company recorded amortization expense of $1.3 million and $1.4 million for the six months ended March 31, 2019 and 2018, respectively.

Intangible assets consisted of the following:

	March 31, 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	$	17,687	$	(10,022	)	$	7,665
Developed technology		11.5		9,563		(2,780	)		6,783
Non-compete		5.0		230		(173	)		57
Patents and other		16.5		2,321		(1,644	)		677
Subtotal				29,801		(14,619	)		15,182
Unamortized intangible assets:
In-process research and development				258		—			258
Trademarks and trade names				580		—			580
Total			$	30,639	$	(14,619	)	$	16,020

	September 30, 2018
(Dollars in thousands)	Weighted Average Original Life (Years)		Gross Carrying Amount		Accumulated Amortization			Net
Definite-lived intangible assets:
Customer lists and relationships		8.9	$	18,086	$	(9,377	)	$	8,709
Developed technology		11.5		9,656		(2,361	)		7,295
Non-compete		5.0		230		(150	)		80
Patents and other		16.5		2,321		(1,569	)		752
Subtotal				30,293		(13,457	)		16,836
Unamortized intangible assets:
In-process research and development				267		—			267
Trademarks and trade names				580		—			580
Total			$	31,140	$	(13,457	)	$	17,683

Based on the intangible assets in service as of March 31, 2019, excluding any possible future amortization associated with acquired in-process research and development (“IPR&D”), which has not met technological feasibility as of March 31, 2019, estimated amortization expense for the remainder of fiscal 2019 and each of the next five fiscal years is as follows (in thousands):

Remainder of 2019	$	1,317
2020		2,458
2021		2,319
2022		2,279
2023		1,685
2024		1,611

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

The Company defines IPR&D as the value of technology acquired for which the related projects have substance and are incomplete. IPR&D acquired in a business acquisition is recognized at fair value and requires the IPR&D to be capitalized as an indefinite-lived intangible asset until completion of the IPR&D project or abandonment. Upon completion of the development project (generally when regulatory approval to market the product is obtained), an impairment assessment is performed prior to amortizing the asset over its estimated useful life. If the IPR&D projects are abandoned, the related IPR&D assets would be written off.