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Note 6 - Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Jun. 30, 2019
--- | --- | ---
Amortized intangible assets, gross | $ 54,625 | $ 54,625
Accumulated amortization | 28,087 | 25,400
Amortized intangible assets, net | 26,538 | 29,225
Indefinite-lived intangible assets, gross | 3,422 | 3,422
Total other intangible assets, gross | 58,047 | 58,047
Total other intangible assets, net | 29,960 | 32,647
Trademarks and Trade Names [Member] |  |
Indefinite-lived intangible assets, gross | 3,422 | 3,422
Customer Relationships [Member] |  |
Amortized intangible assets, gross | 35,563 | 35,563
Accumulated amortization | 14,129 | 12,070
Amortized intangible assets, net | 21,434 | 23,493
Patents [Member] |  |
Amortized intangible assets, gross | 338 | 338
Accumulated amortization | 277 | 247
Amortized intangible assets, net | 61 | 91
Technology-Based Intangible Assets [Member] |  |
Amortized intangible assets, gross | 16,066 |
Accumulated amortization | 12,852 |
Amortized intangible assets, net | 3,214 |
LED Technology Firmware Software [Member] |  |
Amortized intangible assets, gross |  | 16,066
Accumulated amortization |  | 12,364
Amortized intangible assets, net |  | 3,702
Trade Names [Member] |  |
Amortized intangible assets, gross | 2,658 | 2,658
Accumulated amortization | 829 | 719
Amortized intangible assets, net | $ 1,829 | $ 1,939

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