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Note 13 - Severance Costs (Tables) | 6 Months Ended
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Dec. 31, 2020
Employee Severance [Member] |
Notes Tables |
Schedule of Accrued Severance Liability [Table Text Block] |
|  | Six Months |  |  | Six Months |  |  | Fiscal Year |
|  | Ended |  |  | Ended |  |  | Ended |
|  | December 31, |  |  | December 31, |  |  | June 30, |
(In thousands) |  | 2020 |  |  | 2019 |  |  | 2020 |
Balance at beginning of period |  | $ | 639 |  |  | $ | 1,134 |  |  | $ | 1,134 |
Accrual of expense |  |  | 21 |  |  |  | 46 |  |  |  | 344 |
Payments |  |  | (392 | ) |  |  | (319 | ) |  |  | (839 | )
Balance at end of period |  | $ | 268 |  |  | $ | 861 |  |  | $ | 639 |

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- Definition The tabular disclosure of the accrued severance liabilities. + References No definition available. + Details
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Namespace Prefix: | lyts_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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