Note 3 - Segment Reporting Information - Summarized Financial Information by Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Net Sales	$ 108,186	$ 117,470	$ 340,632	$ 373,343
Operating Income (Loss)	7,660	7,732	26,507	26,791
Capital Expenditures	1,277	758	4,626	1,754
Depreciation and amortization	4,680	2,455	7,143	7,295
Corporate and Eliminations [Member]
Operating Income (Loss)	(3,672)	(4,298)	(12,955)	(15,409)
Capital Expenditures	111	19	399	(9)
Depreciation and amortization	75	67	253	189
Lighting Segment [Member]
Net Sales	64,882	66,707	197,318	201,074
Lighting Segment [Member] | Operating Segments [Member]
Operating Income (Loss)	7,268	6,529	24,877	22,441
Capital Expenditures	999	401	3,012	725
Depreciation and amortization	2,635	1,344	3,944	4,113
Display Solutions Segment [Member]
Net Sales	43,304	50,763	143,314	172,269
Display Solutions Segment [Member] | Operating Segments [Member]
Operating Income (Loss)	4,064	5,501	14,585	19,759
Capital Expenditures	167	338	1,215	1,038
Depreciation and amortization	$ 1,970	$ 1,044	$ 2,946	$ 2,993