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Note 17 - Summary of Quarterly Results (Unaudited) (Details) - Subsequent Event [Member] | Aug. 27, 2015
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Note 17 - Summary of Quarterly Results (Unaudited) (Details) [Line Items] |
Number of Shareholders | 508
Number Of Beneficial Shareholders | 3,000

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

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- Definition Number of beneficial shareholders. + References No definition available. + Details
Name: | lyts_NumberOfBeneficialShareholders
Namespace Prefix: | lyts_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Number of shareholders of record. + References No definition available. + Details
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Namespace Prefix: | lyts_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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