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Note 2 - Summarized Financial Information by Reportable Business Segments (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2012
Lighting Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Sales: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  |  |  |  |  | $ 226,889 |  | $ 219,920 |  | $ 222,604 |  |  |
Operating Income (Loss): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) |  |  |  |  |  |  |  |  |  |  |  |  | 15,785 |  | 14,775 |  | 10,524 |  |  |
Capital Expenditures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Expenditures |  |  |  |  |  |  |  |  |  |  |  |  | 4,255 |  | 1,905 |  | 3,294 |  |  |
Depreciation and Amortization: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and Amortization |  |  |  |  |  |  |  |  |  |  |  |  | 2,930 |  | 2,965 |  | 2,779 |  |  |
Graphics Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Sales: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  |  |  |  |  | 77,039 |  | 64,895 |  | 50,970 |  |  |
Operating Income (Loss): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) |  |  |  |  |  |  |  |  |  |  |  |  | 5,429 |  | 1,156 |  | (2,086) |  |  |
Capital Expenditures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Expenditures |  |  |  |  |  |  |  |  |  |  |  |  | 3,605 |  | 1,100 |  | 461 |  |  |
Depreciation and Amortization: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and Amortization |  |  |  |  |  |  |  |  |  |  |  |  | 1,015 |  | 979 |  | 950 |  |  |
Technology Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Sales: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  |  |  |  |  | 18,268 |  | 23,001 |  | 24,515 |  |  |
Operating Income (Loss): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) |  |  |  |  |  |  |  |  |  |  |  |  | 3,845 |  | 2,949 |  | 1,633 |  |  |
Capital Expenditures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Expenditures |  |  |  |  |  |  |  |  |  |  |  |  | 1,935 |  | 1,146 |  | 726 |  |  |
Depreciation and Amortization: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and Amortization |  |  |  |  |  |  |  |  |  |  |  |  | 1,518 |  | 1,341 |  | 1,563 |  |  |
All Other Category [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Sales: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 41 |  | 1,374 |  |  |
Operating Income (Loss): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (183) |  | (854) |  |  |
Capital Expenditures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Expenditures |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4 |  | 20 |  |  |
Depreciation and Amortization: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and Amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 31 |  | 161 |  |  |
Corporate and Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) |  |  |  |  |  |  |  |  |  |  |  |  | (11,103) |  | (11,164) |  | (6,899) |  |  |
Capital Expenditures: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Expenditures |  |  |  |  |  |  |  |  |  |  |  |  | 416 |  | 599 |  | 744 |  |  |
Depreciation and Amortization: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and Amortization |  |  |  |  |  |  |  |  |  |  |  |  | 1,214 |  | 1,015 |  | 773 |  |  |
Net Sales | $ 80,844 | $ 70,740 | $ 84,687 | $ 85,925 | $ 76,073 | $ 68,603 | $ 84,715 | $ 78,466 | $ 73,858 | $ 68,996 | $ 76,123 | $ 80,486 | 322,196 | [1] | 307,857 | [1] | 299,463 | [1] | $ 280,790 | $ 268,402
Operating Income (Loss) |  |  |  |  |  |  |  |  |  |  |  |  | 13,956 |  | 7,533 |  | 2,318 |  | $ 630 | $ 6,331
Capital Expenditures |  |  |  |  |  |  |  |  |  |  |  |  | 10,211 |  | 4,754 |  | 5,245 |  |  |
Depreciation and Amortization |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,677 |  | $ 6,331 |  | $ 6,226 |  |  |
[1] | Net sales are attributed to geographic areas based upon the location of the operation making the sale.

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