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Note 7 - Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Mar. 31, 2018 | Sep. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2017 | Mar. 31, 2018 | Mar. 31, 2017 | Jun. 30, 2017
Goodwill, net | $ 30,538,000 |  |  |  | $ 30,538,000 |  | $ 58,538,000
Goodwill Impairment |  |  | $ (479,000) |  | (28,000,000) | $ (479,000) |
Lighting Segment [Member] |  |  |  |  |  |  |
Goodwill | 94,564,000 |  |  |  | 94,564,000 |  | 94,564,000
Accumulated impairment losses | (65,191,000) |  |  |  | (65,191,000) |  | (37,191,000)
Goodwill, net | 29,373,000 |  |  |  | 29,373,000 |  | 57,373,000
Goodwill Impairment |  | $ (28,000,000) |  | $ (28,000,000) |  |  |
Graphics Segment [Member] |  |  |  |  |  |  |
Goodwill | 28,690,000 |  |  |  | 28,690,000 |  | 28,690,000
Accumulated impairment losses | (27,525,000) |  |  |  | (27,525,000) |  | (27,525,000)
Goodwill, net | 1,165,000 |  |  |  | 1,165,000 |  | 1,165,000
Goodwill Impairment |  |  |  |  |  |  |
Technology Segment [Member] |  |  |  |  |  |  |
Goodwill | 123,254,000 |  |  |  | 123,254,000 |  | 123,254,000
Accumulated impairment losses | (92,716,000) |  |  |  | (92,716,000) |  | (64,716,000)
Goodwill, net | $ 30,538,000 |  |  |  | $ 30,538,000 |  | $ 58,538,000
Goodwill Impairment |  |  |  | $ (28,000,000) |  |  |

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