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Intangible Assets | 6 Months Ended
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Oct. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets | (7) Intangible Assets The components of intangible assets, net as of October 31, 2025 and April 30, 2025 consisted of the following: Schedule of Components of Intangible Assets
|  | October 31, 2025 |  |  | April 30, 2025 |
|  | (in thousands) |
Patents |  | $ | 2,729 |  |  | $ | 2,729 |
Trademarks |  |  | 2,769 |  |  |  | 2,769 |
Intangible assets, gross |  |  | 5,498 |  |  |  | 5,498 |
Accumulated amortization |  |  | (2,075 | ) |  |  | (2,008 | )
Intangible assets, net |  | $ | 3,423 |  |  | $ | 3,490 |
Amortization expense was approximately $66,000 and $66,000 for the six-month periods ended October 31, 2025 and 2024, respectively. Amortization expense was approximately $32,000 and $33,000 for the three-month periods ended October 31, 2025 and 2024, respectively.

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