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Note 2 - Business Segment Information - Intersegment Revenues (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2019 | Jun. 30, 2018
Inter-segment Revenues | $ 328,852 | $ 342,023
Lighting Segment [Member] |  |
Inter-segment Revenues | 235,114 | 260,613
Graphics Segment [Member] |  |
Inter-segment Revenues | 93,738 | 81,410
Intersegment Eliminations [Member] | Lighting Segment [Member] |  |
Inter-segment Revenues | 2,043 | 2,672
Intersegment Eliminations [Member] | Graphics Segment [Member] |  |
Inter-segment Revenues | $ 928 | $ 1,276

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- Definition Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 + Details
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Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |