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Intangible Assets (Tables)

9 Months Ended

Jan. 31, 2021

Intangible Assets Gross Excluding Goodwill [Abstract]

Summary of Intangible Assets

The following table presents a summary of intangible assets as of January 31, 2021 and April 30, 2020 (in thousands):

		January 31, 2021												April 30, 2020
		Gross												Gross
		Carrying				Accumulated				Net Carrying				Carrying				Accumulated				Net Carrying
		Amount				Amortization				Amount				Amount				Amortization				Amount
Customer relationships		$	2,580			$	(2,041	)		$	539			$	2,580			$	(1,932	)		$	648
Developed technology			200				(194	)			6				200				(176	)			24
Patents, trademarks, and trade names			8,242				(5,367	)			2,875				8,140				(5,091	)			3,049
			11,022				(7,602	)			3,420				10,920				(7,199	)			3,721
Patents in progress			1,016				—				1,016				654				—				654
Total definite-lived intangible assets		$	12,038			$	(7,602	)		$	4,436			$	11,574			$	(7,199	)		$	4,375

Schedule of Future Expected Amortization Expense

Estimated amortization expense of intangible assets for the remainder of fiscal 2021 and succeeding fiscal years is as follows (in thousands):

Fiscal		Amount
2021		$	134
2022			495
2023			454
2024			445
2025			434
Thereafter			1,458
Total		$	3,420

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- Definition

Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
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