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Property, Plant and Equipment, Net | 12 Months Ended
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Apr. 30, 2025
Property, Plant and Equipment [Abstract] |
Property, Plant and Equipment Disclosure [Text Block] | 5. Property, Plant and Equipment, net Property, plant and equipment, net, at April 30, 2025 and 2024, consisted of the following (in thousands):
|  | April 30, 2025 |  |  | April 30, 2024 |
Buildings and building improvements |  | $ | 2,923 |  |  | $ | 2,616 |
Machinery, equipment and furniture |  |  | 63,347 |  |  |  | 61,943 |
|  |  | 66,270 |  |  |  | 64,559 |
Less accumulated depreciation |  |  | (60,082 | ) |  |  | (58,121 | )
|  | $ | 6,188 |  |  | $ | 6,438 |
Depreciation and amortization expense were $2.1 million for both the fiscal years ended April 30, 2025 and 2024.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/360/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 6 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477798/958-360-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477798/958-360-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 7 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477798/958-360-50-7 + Details
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