Goodwill and Intangible Assets, Net

9 Months Ended

Jan. 31, 2022

Goodwill And Intangible Assets Disclosure [Abstract]

(4) Goodwill and Intangible Assets, net:

The following table summarizes intangible assets as of January 31, 2022 and April 30, 2021 (in thousands):

	January 31, 2022							April 30, 2021
	Gross							Gross
	Carrying		Accumulated			Net Carrying		Carrying		Accumulated			Net Carrying
	Amount		Amortization			Amount		Amount		Amortization			Amount
Customer relationships	$	89,980	$	(66,053	)	$	23,927	$	89,980	$	(60,347	)	$	29,633
Developed technology		21,588		(15,681	)		5,907		21,588		(14,456	)		7,132
Patents, trademarks, and trade names		50,138		(37,812	)		12,326		50,007		(34,308	)		15,699
		161,706		(119,546	)		42,160		161,575		(109,111	)		52,464
Patents in progress		1,164		—			1,164		749		—			749
Total definite-lived intangible assets		162,870		(119,546	)		43,324		162,324		(109,111	)		53,213
Indefinite-lived intangible assets		430		—			430		430		—			430
Total intangible assets	$	163,300	$	(119,546	)	$	43,754	$	162,754	$	(109,111	)	$	53,643

We amortize intangible assets with determinable lives over a weighted-average period of approximately five years. The weighted-average periods of amortization by intangible asset class is approximately five years for customer relationships, six years for developed technology, and five years for patents, trademarks, and trade names. Amortization expense amounted to $3.4 million and $4.1 million for the three months ended January 31, 2022 and 2021, respectively. Amortization expense amounted to $10.4 million and $12.2 million for the nine months ended January 31, 2022 and 2021, respectively.

Future expected amortization expense for the remainder of fiscal 2022 and for succeeding fiscal years, as of January 31, 2022, are as follows (in thousands):

Fiscal	Amount
2022	$	3,453
2023		11,436
2024		9,698
2025		6,055
2026		4,962
2027		2,970
Thereafter		3,586
Total	$	42,160

As of January 31, 2022, we had $64.3 million of goodwill. We did not have any adjustments to goodwill during the nine months ended January 31, 2022 and 2021, respectively. As of January 31, 2022, we had recorded $109.3 million of goodwill impairment charges since fiscal 2015 on gross goodwill of $173.6 million.