Note 9 - Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands |
9 Months Ended | 12 Months Ended |
|---|---|---|
Mar. 31, 2026 |
Jun. 30, 2025 |
|
| Goodwill | $ 153,836 | $ 146,685 |
| Goodwill acquired, net of adjustments | 143,914 | 6,769 |
| Foreign currency translation | (18) | 382 |
| Accumulated impairment losses | (89,288) | (89,288) |
| Goodwill, net | 208,444 | 64,548 |
| Lighting Segment [Member] | ||
| Goodwill | 70,971 | 70,971 |
| Goodwill acquired, net of adjustments | 0 | 0 |
| Foreign currency translation | 0 | 0 |
| Accumulated impairment losses | (61,763) | (61,763) |
| Goodwill, net | 9,208 | 9,208 |
| Display Solutions Segment [Member] | ||
| Goodwill | 82,865 | 75,714 |
| Goodwill acquired, net of adjustments | 143,914 | 6,769 |
| Foreign currency translation | (18) | 382 |
| Accumulated impairment losses | (27,525) | (27,525) |
| Goodwill, net | $ 199,236 | $ 55,340 |
| X | ||||||||||
- Definition Net amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. No definition available.
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| X | ||||||||||
- Definition Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of foreign currency translation gain (loss) which increases (decreases) asset representing future economic benefit from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount, before accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Includes amount, before amortization expense and impairment loss, of goodwill for private company. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of accumulated impairment loss for asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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