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Note 7 - Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Jun. 30, 2020
--- | --- | ---
Amortized intangible assets, gross | $ 54,625 | $ 54,625
Accumulated amortization | 28,758 | 28,087
Amortized intangible assets, net | 25,867 | 26,538
Indefinite-lived intangible assets, gross | 3,422 | 3,422
Total other intangible assets, gross | 58,047 | 58,047
Total other intangible assets, net | 29,289 | 29,960
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 | 14,644 | 14,129
Amortized intangible assets, net | 20,919 | 21,434
Patents [Member] |  |
Amortized intangible assets, gross | 338 | 338
Accumulated amortization | 285 | 277
Amortized intangible assets, net | 53 | 61
Technology-Based Intangible Assets [Member] |  |
Amortized intangible assets, gross | 16,066 |
Accumulated amortization | 12,973 |
Amortized intangible assets, net | 3,093 |
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 | 856 | 829
Amortized intangible assets, net | $ 1,802 | $ 1,829

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