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Note 3 - Segment Reporting Information -Summarized Financial Information by Reportable Business Segments (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Sep. 30, 2016 | Sep. 30, 2015
Lighting Segment [Member] |  |
Net Sales: |  |
Net Sales | $ 60,370 | $ 59,075
Operating Income (Loss): |  |
Operating Income (Loss) | 2,791 | 5,682
Capital Expenditures: |  |
Capital Expenditures | 1,084 | 689
Depreciation and Amortization: |  |
Depreciation and Amortization | 847 | 705
Graphics Segment [Member] |  |
Net Sales: |  |
Net Sales | 18,894 | 22,330
Operating Income (Loss): |  |
Operating Income (Loss) | 1,017 | 2,234
Capital Expenditures: |  |
Capital Expenditures | 366 | 588
Depreciation and Amortization: |  |
Depreciation and Amortization | 360 | 234
Technology Segment [Member] |  |
Net Sales: |  |
Net Sales | 4,895 | 4,520
Operating Income (Loss): |  |
Operating Income (Loss) | 728 | 1,267
Capital Expenditures: |  |
Capital Expenditures | 12 | 33
Depreciation and Amortization: |  |
Depreciation and Amortization | 345 | 336
Corporate and Eliminations [Member] |  |
Operating Income (Loss): |  |
Operating Income (Loss) | (3,470) | (3,420)
Capital Expenditures: |  |
Capital Expenditures | 498 | 52
Depreciation and Amortization: |  |
Depreciation and Amortization | 283 | 301
Net Sales | 84,159 | 85,925
Operating Income (Loss) | 1,066 | 5,763
Capital Expenditures | 1,960 | 1,362
Depreciation and Amortization | $ 1,835 | $ 1,576

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