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Note 10 - Cash Dividends (Details Textual) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 3 Months Ended
--- | --- | ---
Nov. 26, 2024 | Sep. 30, 2024 | Sep. 30, 2023
Payments of Dividends |  | $ 1.5 | $ 1.4
Dividends Accrued |  | $ 0.2 | $ 0.1
O 2025 A Dividends [Member] |  |  |
Dividends Payable, Amount Per Share |  | $ 0.2 |
Subsequent Event [Member] | O 2025 Q2 Dividends [Member] |  |  |
Dividends Payable, Amount Per Share | $ 0.05 |  |
Dividends Payable, Date to be Paid | Nov. 26, 2024 |  |
Dividends Payable, Date of Record | Nov. 18, 2024 |  |

X
- Definition Dividends declared but unpaid on equity securities issued by the entity during the period. + References No definition available. + Details
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Namespace Prefix: | lyts_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Date the declared dividend will be paid, in YYYY-MM-DD format. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-3 + Details
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Balance Type: | na
Period Type: | duration

X
- Definition The per share amount of a dividend declared, but not paid, as of the financial reporting date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-3 + Details
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X
- Definition Date the holder must own the stock to be entitled to the dividend, in YYYY-MM-DD format. + References No definition available. + Details
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X
- Definition Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 15 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-15 + Details
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X
- Details
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Namespace Prefix: |
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Period Type: |

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- Details
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Period Type: |

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- Details
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Balance Type: |
Period Type: |