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Note 16 - Related Party Transactions (Tables) | 12 Months Ended
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Jun. 30, 2015
Related Party Transactions [Abstract] |
Schedule of Related Party Transactions [Table Text Block] |
|  | 201 5 |  |  | 2014 |  |  | 2013 |
Keating Muething & Klekamp PLL |  | $ | 500 |  |  | $ | 98 |  |  | $ | 84 |
American Engineering and Metal Working |  | $ | 300 |  |  | $ | 215 |  |  | $ | 394 |
3970957 Canada Inc. |  | $ | 42 |  |  | $ | 161 |  |  | $ | 182 |
Synergy Electronic LTD |  | $ | 7 |  |  | $ | 171 |  |  | $ | 232 |
Schedule of Related Party Debt [Table Text Block] |
|  | June 30, |  |  | June 30, |
|  | 201 5 |  |  | 2014 |
Keating Muething & Klekamp PLL |  | $ | 35 |  |  | $ | 5 |
American Engineering and Metal Working |  | $ | 1 |  |  | $ | — |
Synergy Electronic LTD |  | $ | — |  |  | $ | 8 |

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- Definition Tabular disclosure of related party debt. + 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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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
Name: | us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration