Note 4 - Business Segment Information - Summarized Financial Information by Operating Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Net Sales	$ 573,377	$ 469,638
Capital expenditures	3,465	5,388
Operating income	35,769	35,517
Long-term performance based compensation	4,939	4,380
Depreciation and amortization	12,575	9,999
Severance costs and restructuring costs	300	539
Amortization expense of acquired intangible assets	5,869	4,958
Acquisition costs	1,047
Acquisition costs		1,001
Business Combination, Acquisition-Related Cost, Expense	$ 1,047
Acquisition costs		1,001
Business Combination, Achieved in Stages, Preacquisition Equity Interest in Acquiree, Remeasurement, Loss, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)
Adjusted operating income	$ 48,361	46,395
Expense on step-up basis of acquired assets	356
Depreciation Expense	6,706	5,041
Consulting expense: commercial growth initiatives	81
Adjusted EBITDA	55,067	51,436
Lighting Segment [Member]
Net Sales	248,357	262,413
Display Solutions Segment [Member]
Net Sales	325,020	207,225
Operating Segments [Member] | Lighting Segment [Member]
Net Sales	248,357	262,413
Capital expenditures	1,883	3,555
Operating income	30,253	33,327
Long-term performance based compensation	338	176
Depreciation and amortization	5,060	5,167
Severance costs and restructuring costs	83	26
Amortization expense of acquired intangible assets	2,412	2,413
Acquisition costs	0
Acquisition costs		0
Business Combination, Acquisition-Related Cost, Expense	0
Acquisition costs		0
Adjusted operating income	33,086	35,942
Expense on step-up basis of acquired assets	0
Depreciation Expense	2,639	2,753
Consulting expense: commercial growth initiatives	0
Adjusted EBITDA	35,725	38,695
Operating Segments [Member] | Display Solutions Segment [Member]
Net Sales	325,020	207,225
Capital expenditures	1,499	1,386
Operating income	26,353	19,969
Long-term performance based compensation	1,068	994
Depreciation and amortization	7,190	4,480
Severance costs and restructuring costs	195	513
Amortization expense of acquired intangible assets	3,457	2,545
Acquisition costs	0
Acquisition costs		0
Business Combination, Acquisition-Related Cost, Expense	0
Acquisition costs		0
Adjusted operating income	31,429	24,021
Expense on step-up basis of acquired assets	356
Depreciation Expense	3,715	1,934
Consulting expense: commercial growth initiatives	0
Adjusted EBITDA	35,144	25,955
Corporate and Eliminations [Member]
Net Sales	0	0
Capital expenditures	83	447
Operating income	(20,837)	(17,779)
Long-term performance based compensation	3,533	3,210
Depreciation and amortization	325	352
Severance costs and restructuring costs	22	0
Amortization expense of acquired intangible assets	0	0
Acquisition costs	1,047
Acquisition costs		1,001
Business Combination, Acquisition-Related Cost, Expense	1,047
Acquisition costs		1,001
Adjusted operating income	(16,154)	(13,568)
Expense on step-up basis of acquired assets	0
Depreciation Expense	352	354
Consulting expense: commercial growth initiatives	81
Adjusted EBITDA	$ (15,802)	$ (13,214)