Note 3 - Business Segment Information - Summarized Financial Information by Operating Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Net Sales	$ 469,638	$ 496,979
Operating income (loss)	35,517	37,028
Capital expenditures	5,388	3,208
Depreciation and amortization	9,999	9,664
Corporate and Eliminations [Member]
Operating income (loss)	(17,779)	(19,525)
Capital expenditures	447	6
Depreciation and amortization	352	264
Lighting Segment [Member]
Net Sales	262,413	272,451
Lighting Segment [Member] | Operating Segments [Member]
Operating income (loss)	33,327	31,633
Capital expenditures	3,555	1,829
Depreciation and amortization	5,167	5,423
Display Solutions Segment [Member]
Net Sales	207,225	224,528
Display Solutions Segment [Member] | Operating Segments [Member]
Operating income (loss)	19,969	24,920
Capital expenditures	1,386	1,373
Depreciation and amortization	$ 4,480	$ 3,977