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Note 7 - Goodwill and Other Intangible Assets (Tables) | 6 Months Ended
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Dec. 31, 2020
Notes Tables |
Schedule of Goodwill [Table Text Block] |
Goodwill |  |  |  |  |  |  |  |  |  |  |  |
(In thousands) |  | Lighting |  |  | Graphics |  |  |  |  |
|  | Segment |  |  | Segment |  |  | Total |
Balance as of December 31, 2020 |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  | $ | 70,971 |  |  | $ | 28,690 |  |  | $ | 99,661 |
Accumulated impairment losses |  |  | (61,763 | ) |  |  | (27,525 | ) |  |  | (89,288 | )
Goodwill, net as of December 31, 2020 |  | $ | 9,208 |  |  | $ | 1,165 |  |  | $ | 10,373 |
Balance as of June 30, 2020 |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  | $ | 86,711 |  |  | $ | 28,690 |  |  | $ | 115,401 |
Accumulated impairment losses |  |  | (77,503 | ) |  |  | (27,525 | ) |  |  | (105,028 | )
Goodwill, net as of June 30, 2020 |  | $ | 9,208 |  |  | $ | 1,165 |  |  | $ | 10,373 |
Schedule of Intangible Assets and Goodwill [Table Text Block] |
Other Intangible Assets |  | December 31, 2020 |
(In thousands) |  | Gross |  |  |  |  |  |  |  |  |
|  | Carrying |  |  | Accumulated |  |  | Net |
|  | Amount |  |  | Amortization |  |  | Amount |
Amortized Intangible Assets |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships |  | $ | 30,163 |  |  | $ | 9,758 |  |  | $ | 20,405 |
Patents |  |  | 268 |  |  |  | 222 |  |  |  | 46 |
LED technology firmware, software |  |  | 16,066 |  |  |  | 13,094 |  |  |  | 2,972 |
Trade name |  |  | 2,658 |  |  |  | 884 |  |  |  | 1,774 |
Total Amortized Intangible Assets |  |  | 49,155 |  |  |  | 23,958 |  |  |  | 25,197 |
Indefinite-lived Intangible Assets |  |  |  |  |  |  |  |  |  |  |  |
Trademarks and trade names |  |  | 3,422 |  |  |  | - |  |  |  | 3,422 |
Total indefinite-lived Intangible Assets |  |  | 3,422 |  |  |  | - |  |  |  | 3,422 |
Total Other Intangible Assets |  | $ | 52,577 |  |  | $ | 23,958 |  |  | $ | 28,619 |
Other Intangible Assets |  | June 30, 2020 |
(In thousands) |  | Gross |  |  |  |  |  |  |  |  |
|  | Carrying |  |  | Accumulated |  |  | Net |
|  | Amount |  |  | Amortization |  |  | Amount |
Amortized Intangible Assets |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships |  | $ | 35,563 |  |  | $ | 14,129 |  |  | $ | 21,434 |
Patents |  |  | 338 |  |  |  | 277 |  |  |  | 61 |
LED technology firmware, software |  |  | 16,066 |  |  |  | 12,852 |  |  |  | 3,214 |
Trade name |  |  | 2,658 |  |  |  | 829 |  |  |  | 1,829 |
Total Amortized Intangible Assets |  |  | 54,625 |  |  |  | 28,087 |  |  |  | 26,538 |
Indefinite-lived Intangible Assets |  |  |  |  |  |  |  |  |  |  |  |
Trademarks and trade names |  |  | 3,422 |  |  |  | - |  |  |  | 3,422 |
Total indefinite-lived Intangible Assets |  |  | 3,422 |  |  |  | - |  |  |  | 3,422 |
Total Other Intangible Assets |  | $ | 58,047 |  |  | $ | 28,087 |  |  | $ | 29,960 |
Finite-lived Intangible Assets Amortization Expense [Table Text Block] |
|  | Three Months Ended |  |  | Six Months Ended |
|  | December 31 |  |  | December 31 |
(In thousands) |  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
Amortization Expense of Other Intangible Assets |  | $ | 670 |  |  | $ | 671 |  |  | $ | 1,341 |  |  | $ | 1,346 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
(In thousands) |  |  |  |
2021 |  | $ | 2,682 |
2022 |  | $ | 2,461 |
2023 |  | $ | 2,412 |
2024 |  | $ | 2,412 |
2025 |  | $ | 2,412 |
After 2025 |  | $ | 14,159 |

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