Note 4 - Segment Reporting Information - Intersegment Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Net sales	$ 147,734	$ 109,005	$ 285,829	$ 232,446
Lighting Segment [Member]
Net sales	58,210	64,795	116,646	132,436
Display Solutions Segment [Member]
Net sales	89,524	44,210	169,183	100,010
Intersegment Eliminations [Member] | Lighting Segment [Member]
Net sales	6,053	5,286	12,037	12,150
Intersegment Eliminations [Member] | Display Solutions Segment [Member]
Net sales	$ 133	$ (15)	$ 304	$ 440