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Note 16 - Income Taxes (Details Textual) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Sep. 30, 2020 | Sep. 30, 2019
Income Tax Benefit Cares Act | $ 0.4 |
Deferred Tax Assets, Property, Plant and Equipment |  | $ 0.9
Sale of Manufacturing Facility in North Canton, Ohio [Member] |  |
Gain (Loss) on Disposition of Property Plant Equipment, Total |  | $ 4.8

X
- Definition Amount of income tax benefit related to the CARES Act. + References No definition available. + Details
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Namespace Prefix: | lyts_
Data Type: | xbrli:monetaryItemType
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X
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from property, plant, and equipment. + References No definition available. + Details
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X
- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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X
- Details
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