Note 5 - Business Segment Information - Summarized Financial Information by Operating Segments (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Mar. 31, 2026 |
Dec. 31, 2025 |
Sep. 30, 2025 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Dec. 31, 2024 |
Sep. 30, 2024 |
Jun. 30, 2024 |
Mar. 31, 2024 |
Dec. 31, 2023 |
Sep. 30, 2023 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2024 |
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| Net sales | $ 689,397 | $ 573,377 | $ 469,638 | ||||||||||||||
| Interest expense | (5,928) | (3,129) | (2,156) | ||||||||||||||
| Long-term performance based compensation | (3,458) | (3,951) | (3,272) | ||||||||||||||
| Amortization expense of acquired intangible assets | (7,220) | (4,745) | (3,671) | ||||||||||||||
| Severance costs and restructuring costs | (63) | (240) | (396) | ||||||||||||||
| Acquisition costs | (8,340) | (900) | (735) | ||||||||||||||
| Lease expense on the step-up basis of acquired leases | (508) | (285) | |||||||||||||||
| Foreign currency translation loss on intercompany loan | (329) | 489 | |||||||||||||||
| Tax rate difference between reported and adjusted net income | 293 | 1,132 | 757 | ||||||||||||||
| Net income | $ 6,876 | $ 2,091 | $ 6,348 | $ 7,264 | $ 8,171 | $ 3,883 | $ 5,647 | $ 6,682 | $ 5,668 | $ 5,375 | $ 5,906 | $ 8,028 | 22,579 | 24,383 | 24,977 | ||
| Capital expenditures | 5,142 | 3,465 | 5,388 | ||||||||||||||
| Income tax expense | 8,895 | 8,655 | 8,122 | ||||||||||||||
| Depreciation and amortization | 16,565 | 12,575 | 9,999 | ||||||||||||||
| Operating and Intersegment [Member] | |||||||||||||||||
| Net sales | 689,397 | 573,377 | 469,638 | ||||||||||||||
| Lighting Segment [Member] | |||||||||||||||||
| Net sales | 266,223 | 248,357 | 262,413 | ||||||||||||||
| Lighting Segment [Member] | Operating and Intersegment [Member] | |||||||||||||||||
| Net sales | 266,223 | 248,357 | 262,413 | ||||||||||||||
| Display Solutions Segment [Member] | |||||||||||||||||
| Net sales | 423,174 | 325,020 | 207,225 | ||||||||||||||
| Display Solutions Segment [Member] | Operating and Intersegment [Member] | |||||||||||||||||
| Net sales | 423,174 | 325,020 | 207,225 | ||||||||||||||
| Operating Segments [Member] | |||||||||||||||||
| Net sales | 705,695 | 594,246 | 493,287 | ||||||||||||||
| Other segment items * | [1] | (621,023) | (524,991) | (422,157) | |||||||||||||
| Adjusted net income | 68,374 | 48,386 | 47,481 | ||||||||||||||
| Capital expenditures | 5,044 | 3,382 | 4,941 | ||||||||||||||
| Income tax expense | 10,126 | 15,610 | 11,596 | ||||||||||||||
| Depreciation and amortization | 16,155 | 12,250 | 9,647 | ||||||||||||||
| Operating Segments [Member] | Lighting Segment [Member] | |||||||||||||||||
| Net sales | 281,169 | 268,332 | 285,264 | ||||||||||||||
| Other segment items * | [1] | (236,788) | (222,588) | (233,643) | |||||||||||||
| Adjusted net income | 29,435 | 25,769 | 28,770 | ||||||||||||||
| Capital expenditures | 2,192 | 1,883 | 3,555 | ||||||||||||||
| Income tax expense | 6,064 | 7,318 | 7,172 | ||||||||||||||
| Depreciation and amortization | 5,089 | 5,060 | 5,167 | ||||||||||||||
| Operating Segments [Member] | Display Solutions Segment [Member] | |||||||||||||||||
| Net sales | 424,526 | 325,914 | 208,023 | ||||||||||||||
| Other segment items * | [1] | (384,235) | (302,403) | (188,514) | |||||||||||||
| Adjusted net income | 38,939 | 22,617 | 18,711 | ||||||||||||||
| Capital expenditures | 2,852 | 1,499 | 1,386 | ||||||||||||||
| Income tax expense | 4,062 | 8,292 | 4,424 | ||||||||||||||
| Depreciation and amortization | 11,066 | 7,190 | 4,480 | ||||||||||||||
| Intersegment Eliminations [Member] | |||||||||||||||||
| Net sales | (16,298) | (20,869) | (23,649) | ||||||||||||||
| Intersegment Eliminations [Member] | Lighting Segment [Member] | |||||||||||||||||
| Net sales | (14,946) | (19,975) | (22,851) | ||||||||||||||
| Intersegment Eliminations [Member] | Display Solutions Segment [Member] | |||||||||||||||||
| Net sales | (1,352) | (894) | (798) | ||||||||||||||
| Corporate and Eliminations [Member] | |||||||||||||||||
| Capital expenditures | 98 | 83 | 447 | ||||||||||||||
| Income tax expense | (1,231) | (6,955) | (3,474) | ||||||||||||||
| Depreciation and amortization | 410 | 325 | 352 | ||||||||||||||
| Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] | |||||||||||||||||
| Adjusted net income | $ (20,242) | $ (12,374) | $ (13,031) | ||||||||||||||
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| X | ||||||||||
- Definition The adjusted portion of profit or loss for the period, net of income taxes, which is attributable to the parent. No definition available.
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| X | ||||||||||
- Definition The aggregate expense charged against earnings to allocate the cost of acquired intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. No definition available.
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| X | ||||||||||
- Definition Amount of expense for long-term performance based compensation. No definition available.
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| X | ||||||||||
- Definition The amount of other segment items. No definition available.
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| X | ||||||||||
- Definition Amount of tax rate difference between reported and adjustment net income during a period of time. No definition available.
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| X | ||||||||||
- Definition Amount of expense for acquisition-related cost incurred to effect business combination. Includes, but is not limited to, finder's fee; advisory, legal, accounting, valuation, and other professional and consulting fees; and general administrative cost, including cost of maintaining internal acquisition department. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of loss from remeasurement of acquisition-date fair value of equity interest in acquiree held by acquirer immediately before acquisition date in business combination achieved in stages. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, after tax, of realized and unrealized gain (loss) from foreign currency transaction. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of interest expense classified as operating and nonoperating. Includes, but is not limited to, cost of borrowing accounted for as interest expense. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of expenditure for addition to long-lived asset included in determination of segment asset by chief operating decision maker (CODM) or otherwise regularly provided to CODM. Long-lived asset excludes financial instrument, long-term customer relationship of financial institution, mortgage and other servicing rights, deferred policy acquisition cost, and deferred tax asset. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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