XML 22 R47.htm IDEA: XBRL DOCUMENT
v3.20.1

Note 7 - Goodwill and Other Intangible Assets (Details Textual) $ in Thousands |  | 9 Months Ended
--- | --- | ---
Mar. 01, 2020 USD ($) | Mar. 31, 2020
Number of Reporting Units |  | 2
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | $ 0 |
Intangible Assets, Indefinite-lived, Amount of Fair Value in Excess of Carrying Amount | $ 16,800 |
Intangible Assets, Indefinite-lived, Percentage of Fair Value in Excess of Carrying Amount | 392.00% |
Lighting Segment [Member] |  |
Number of Reporting Units |  | 1
Good will Impairment Testing Value Above Carrying Value | $ 31,600 |
Good will Impairment Testing Percent Value Above Carrying Value | 33.00% |
Graphics Segment [Member] |  |
Number of Reporting Units |  | 1
Good will Impairment Testing Value Above Carrying Value | $ 4,700 |
Good will Impairment Testing Percent Value Above Carrying Value | 619.00% |

X
- Definition The percentage by which the estimated business enterprise value is above the carrying value of the reporting unit when tested for impairment. + References No definition available. + Details
Name: | lyts_GoodWillImpairmentTestingPercentValueAboveCarryingValue
Namespace Prefix: | lyts_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount by which the estimated business enterprise value is above the carrying value of the reporting unit when tested for impairment. + References No definition available. + Details
Name: | lyts_GoodWillImpairmentTestingValueAboveCarryingValue
Namespace Prefix: | lyts_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of fair value of indefinite lived intangible assets in excess of carrying amount. + References No definition available. + Details
Name: | lyts_IntangibleAssetsIndefinitelivedAmountOfFairValueInExcessOfCarryingAmount
Namespace Prefix: | lyts_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Percentage of fair value of indefinite lives intangible assets in excess of carrying amount. + References No definition available. + Details
Name: | lyts_IntangibleAssetsIndefinitelivedPercentageOfFairValueInExcessOfCarryingAmount
Namespace Prefix: | lyts_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -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
Name: | us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment. + References No definition available. + Details
Name: | us-gaap_NumberOfReportingUnits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=lyts_LightingSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=lyts_GraphicsSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |