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Note 2 - Summary of Significant Accounting Policies (Tables) | 3 Months Ended
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Sep. 30, 2017
Notes Tables |
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] |
(In thousands) |  | September 30 , |  |  | June 30, |
|  | 201 7 |  |  | 201 7 |
Accounts receivable |  | $ | 54,688 |  |  | $ | 49,386 |
Less: Allowance for doubtful accounts |  |  | (436 | ) |  |  | (506 | )
Accounts receivable, net |  | $ | 54,252 |  |  | $ | 48,880 |
Property, Plant and Equipment [Table Text Block] |
Buildings (years) |  | 28 | - | 40
Machinery and equipment (years) |  | 3 | - | 10
Computer software (years) |  | 3 | - | 8
Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block] |
|  |  |  |  | Fair Value Measurements Using |  |  |  |  |
Description |  | Quarter Ended 9/30/2017 |  | Quoted Prices in Active Markets for Identical Assets (Level 1) | Significant Other Observable inputs (Level 2) |  | Significant Unobservable inputs (Level 3) |  |  | Total Gains (Losses) |
Lighting Segment Goodwill |  | $ | 29,373,000 |  |  |  |  | $ | 29,373,000 |  |  | $ | (28,000,000 | )
Schedule of Product Warranty Liability [Table Text Block] |
|  | Three |  |  | Three |  |  | Fiscal |
|  | Months Ended |  |  | Months Ended |  |  | Year Ended |
(In thousands) |  | September 30, |  |  | September 30, |  |  | June 30, |
|  | 201 7 |  |  | 201 6 |  |  | 201 7 |
Balance at beginning of the period |  | $ | 7,560 |  |  | $ | 5,069 |  |  | $ | 5,069 |
Additions charged to expense |  |  | 927 |  |  |  | 903 |  |  |  | 4,956 |
Addition for acquired company |  |  |  |  |  |  |  |  |  |  | 907 |
Deductions for repairs and r eplacements |  |  | (1,818 | ) |  |  | (624 | ) |  |  | (3,372 | )
Balance at end of the period |  | $ | 6,669 |  |  | $ | 5,348 |  |  | $ | 7,560 |

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