Note 5 - Segment Reporting Information - Summarized Financial Information by Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Net Sales	$ 132,481	$ 108,186	$ 418,310	$ 340,632
Operating Income (Loss)	6,235	7,660	23,825	26,507
Capital Expenditures	690	1,277	2,515	4,626
Depreciation and amortization	3,061	2,414	9,020	7,143
Corporate and Eliminations [Member]
Operating Income (Loss)	(5,429)	(3,672)	(15,404)	(12,955)
Capital Expenditures	86	111	114	399
Depreciation and amortization	84	90	258	253
Lighting Segment [Member]
Net Sales	58,967	64,882	175,614	197,318
Lighting Segment [Member] | Operating Segments [Member]
Operating Income (Loss)	7,154	7,268	18,885	24,877
Capital Expenditures	246	999	1,467	3,012
Depreciation and amortization	1,284	1,342	3,778	3,944
Display Solutions Segment [Member]
Net Sales	73,514	43,304	242,696	143,314
Display Solutions Segment [Member] | Operating Segments [Member]
Operating Income (Loss)	4,510	4,064	20,344	14,585
Capital Expenditures	358	167	934	1,215
Depreciation and amortization	$ 1,693	$ 982	$ 4,984	$ 2,946