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Note 7 - Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Jun. 30, 2020
--- | --- | ---
Amortized intangible assets, gross | $ 49,155 | $ 54,625
Accumulated amortization | 23,958 | 28,087
Amortized intangible assets, net | 25,197 | 26,538
Indefinite-lived intangible assets, gross | 3,422 | 3,422
Total other intangible assets, gross | 52,577 | 58,047
Total other intangible assets, net | 28,619 | 29,960
Trademarks and Trade Names [Member] |  |
Indefinite-lived intangible assets, gross | 3,422 | 3,422
Customer Relationships [Member] |  |
Amortized intangible assets, gross | 30,163 | 35,563
Accumulated amortization | 9,758 | 14,129
Amortized intangible assets, net | 20,405 | 21,434
Patents [Member] |  |
Amortized intangible assets, gross | 268 | 338
Accumulated amortization | 222 | 277
Amortized intangible assets, net | 46 | 61
Technology-Based Intangible Assets [Member] |  |
Amortized intangible assets, gross | 16,066 |
Accumulated amortization | 13,094 |
Amortized intangible assets, net | 2,972 |
LED Technology Firmware Software [Member] |  |
Amortized intangible assets, gross |  | 16,066
Accumulated amortization |  | 12,852
Amortized intangible assets, net |  | 3,214
Trade Names [Member] |  |
Amortized intangible assets, gross | 2,658 | 2,658
Accumulated amortization | 884 | 829
Amortized intangible assets, net | $ 1,774 | $ 1,829

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