Goodwill and other Identifiable Intangible Assets (Tables)

12 Months Ended

Sep. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Amortizable Identifiable Intangible Assets

Amortizable identifiable intangible assets, net as of September 30, 2019 and 2018 were comprised of the following (in thousands):

	September 30, 2019							September 30, 2018
	Gross carrying amount		Accum. amort.			Net		Gross carrying amount		Accum. amort.			Net
Purchased and core technology	$	57,699	$	(50,986	)	$	6,713	$	58,102	$	(48,693	)	$	9,409
License agreements	102		(74		)	28		102		(46		)	56
Patents and trademarks	14,577		(11,970		)	2,607		15,701		(12,242		)	3,459
Customer relationships	46,315		(25,266		)	21,049		46,605		(21,049		)	25,556
Non-compete agreements	600		(330		)	270		600		(210		)	390
Order backlog	1,800		(1,800		)	—		1,800		(1,350		)	450
Total	$	121,093	$	(90,426	)	$	30,667	$	122,910	$	(83,590	)	$	39,320

Schedule of Amortization Expense

Amortization expense for fiscal years 2019, 2018 and 2017 was as follows (in thousands):

Fiscal year	Total
2019	$	8,818
2018	$	9,435
2017	$	2,597

Schedule of Estimated Future Amortization Expense Related to Identifiable Intangible Assets

Estimated amortization expense for the next five years is as follows (in thousands):

Fiscal year	Total
2020	$	8,277
2021	$	7,434
2022	$	6,590
2023	$	4,392
2024	$	3,689

Schedule of Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill by reportable segments are (in thousands):

	Fiscal years ended September 30,
	IoT Products and Services			IoT Solutions			Total
Balance on September 30, 2017	$	98,981		$	33,014		$	131,995
Acquisitions	5,663			17,553			23,216
Foreign currency translation adjustment	(286		)	(390		)	(676		)
Balance on September 30, 2018	$	104,358		$	50,177		$	154,535
Foreign currency translation adjustment	(839		)	(274		)	(1,113		)
Balance at September 30, 2019	$	103,519		$	49,903		$	153,422