Note 12 - Income Taxes - Components of Deferred Income Tax Assets and (Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Jun. 30, 2023
Uncertain tax positions	$ 241	$ 185
Reserves against current assets	1,408	1,255
Accrued expenses	3,029	3,381
Deferred compensation	2,008	1,459
Stock-based compensation	1,859	1,680
Capitalized R&D	1,985	0
State net operating loss carryover and credits	120	140
Lease Liability	4,187	2,397
Canadian NOL	313	319
U.S. Federal net operating loss carryover and credits	52	258
Deferred income tax asset before valuation allowance	15,202	11,074
Valuation allowance	(108)	(108)
Deferred income tax asset	15,094	10,966
Goodwill, acquisition costs and intangible assets	(3,977)	(3,749)
Depreciation	(2,048)	(1,634)
Right of Use Asset	(4,149)	(2,269)
Deferred income tax liability	(10,174)	(7,652)
Net deferred income tax asset	$ 4,920	$ 3,314

Represents the amount of deferred tax assets attributable to capitalized research and development.

No definition available.

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- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to lease liability.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to state and local operating loss carryforwards and tax credits.

+ References

No definition available.

+ Details

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Namespace Prefix:	lyts_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of deferred tax assets, operating loss carryforwards, domestic and tax credit carryforwards.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to uncertain tax positions.

+ References

No definition available.

+ Details

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Namespace Prefix:	lyts_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign operating loss carryforwards.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-6

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from employee compensation.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from accrued liabilities.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences from reserves, classified as other.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

+ Details

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- Definition

Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Amount of deferred tax liability attributable to taxable temporary differences from intangible assets including goodwill.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

Amount of deferred tax liability attributable to taxable temporary differences from leasing arrangements.

+ References

+ Details

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- Definition

Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
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