Goodwill and Intangible Assets, Net

3 Months Ended

Jul. 31, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

(4) Goodwill and Intangible Assets, net:

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

	July 31, 2021							April 30, 2021
	Gross							Gross
	Carrying		Accumulated			Net Carrying		Carrying		Accumulated			Net Carrying
	Amount		Amortization			Amount		Amount		Amortization			Amount
Customer relationships	$	89,980	$	(62,248	)	$	27,732	$	89,980	$	(60,347	)	$	29,633
Developed technology		21,588		(14,903	)		6,685		21,588		(14,456	)		7,132
Patents, trademarks, and trade names		50,024		(35,474	)		14,550		50,007		(34,308	)		15,699
		161,592		(112,625	)		48,967		161,575		(109,111	)		52,464
Patents in progress		924		—			924		749		—			749
Total definite-lived intangible assets		162,516		(112,625	)		49,891		162,324		(109,111	)		53,213
Indefinite-lived intangible assets		430		—			430		430		—			430
Total intangible assets	$	162,946	$	(112,625	)	$	50,321	$	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 $3.5 million and $4.0 million for the three months ended July 31, 2021 and 2020, respectively.

Future expected amortization expense for the remainder of fiscal 2022 and for succeeding fiscal years, as of July 31, 2021, are as follows (in thousands):

Fiscal	Amount
2022		10,363
2023		11,429
2024		9,690
2025		6,048
2026		4,955
2027		2,963
Thereafter		3,519
Total	$	48,967

As of July 31, 2021, we had $64.3 million of goodwill. We did not have any adjustments to goodwill during the three months ended July 31, 2021 and 2020, respectively. As of July 31, 2021, we had recorded $109.3 million of goodwill impairment charges since fiscal 2015 on gross goodwill of $173.6 million.