Note 8 - Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Goodwill	$ 146,685	$ 134,318
Goodwill acquired	6,769	12,367
Accumulated impairment losses	(89,288)	(89,288)
Goodwill, net	64,548	57,397
Foreign currency translation	382
Lighting Segment [Member]
Goodwill	70,971	70,971
Goodwill acquired	0	0
Accumulated impairment losses	(61,763)	(61,763)
Goodwill, net	9,208	9,208
Foreign currency translation	0
Display Solutions Segment [Member]
Goodwill	75,714	63,347
Goodwill acquired	6,769	12,367
Accumulated impairment losses	(27,525)	(27,525)
Goodwill, net	55,340	$ 48,189
Foreign currency translation	$ 382