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Intangible Assets | 12 Months Ended
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Apr. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets | (7) Intangible Assets The components of intangible assets, net as of April 30, 2024 and 2023 consisted of the following: Schedule of Components of Intangible Assets
|  | April 30, 2024 |  |  | April 30, 2023 |
|  | (in thousands) |
Patents |  | $ | 2,729 |  |  | $ | 2,729 |
Trademarks |  |  | 2,769 |  |  |  | 2,769 |
Tradename |  |  | — |  |  |  | 130 |
Customer Relationships |  |  | — |  |  |  | 150 |
Intangible assets, gross |  |  | 5,498 |  |  |  | 5,778 |
Accumulated amortization |  |  | (1,876 | ) |  |  | (1,800 | )
Intangible assets, net |  | $ | 3,622 |  |  | $ | 3,978 |
Amortization expense was approximately $148,000 and $158,000 for the years ended April 30, 2024 and 2023, respectively. Trademarks are not subject to amortization. Additionally, in connection with the sale of 3Dent in November of 2023, the trade-name and customer relationships were both expensed fully during the fiscal year ended April 30, 2024 under Loss on disposition of assets on the Consolidated Statements of Operations.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-4 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 985 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481283/985-20-50-2 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 985 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/985-20/tableOfContent + Details
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