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Note 2 - Summary of Significant Accounting Policies (Tables) | 6 Months Ended
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Dec. 31, 2019
Notes Tables |
Disaggregation of Revenue [Table Text Block] |
|  | Three Months Ended |  |  | Six Months Ended |
(In thousands) |  | December 31, 2019 |  |  | December 31, 2019 |
|  | Lighting Segment |  |  | Graphics Segment |  |  | Lighting Segment |  |  | Graphics Segment |
Timing of revenue recognition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Products and services transferred at a point in time |  | $ | 47,513 |  |  | $ | 17,521 |  |  | $ | 104,038 |  |  | $ | 35,246 |
Products and services transferred over time |  |  | 5,923 |  |  |  | 11,420 |  |  |  | 12,589 |  |  |  | 19,205 |
|  | $ | 53,436 |  |  | $ | 28,941 |  |  | $ | 116,627 |  |  | $ | 54,451 |
|  | Three Months Ended |  |  | Six Months Ended |
|  | December 31, 2019 |  |  | December 31, 2019 |
|  | Lighting Segment |  |  | Graphics Segment |  |  | Lighting Segment |  |  | Graphics Segment |
Type of Product and Services |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
LED lighting, digital signage solutions, electronic circuit boards |  | $ | 46,596 |  |  | $ | 7,407 |  |  | $ | 101,079 |  |  | $ | 11,281 |
Legacy products |  |  | 6,265 |  |  |  | 16,011 |  |  |  | 14,303 |  |  |  | 32,711 |
Turnkey services and other |  |  | 575 |  |  |  | 5,523 |  |  |  | 1,245 |  |  |  | 10,459 |
|  | $ | 53,436 |  |  | $ | 28,941 |  |  | $ | 116,627 |  |  | $ | 54,451 |
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] |
|  |  |  |  |  |  |  |  |  | Opening |
|  | Balance as of |  |  |  |  |  |  | Balance as of |
|  | June 30, 2018 |  |  | Adjustments |  |  | June 30, 2018 |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable, net |  | $ | 50,609 |  |  | $ | 4,935 |  |  | $ | 55,544 |
Inventories, net |  | $ | 50,994 |  |  | $ | (4,167 | ) |  | $ | 46,827 |
Other long-term assets, net |  | $ | 9,786 |  |  | $ | (177 | ) |  | $ | 9,609 |
Shareholder's Equity: |  |  |  |  |  |  |  |  |  |  |  |
Retained earnings |  | $ | 15,124 |  |  | $ | 591 |  |  | $ | 15,715 |

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