Note 9 - Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Goodwill	$ 153,836	$ 146,685
Goodwill acquired, net of adjustments	108,148	6,769
Foreign currency translation	(571)	382
Accumulated impairment losses	(89,288)	(89,288)
Goodwill, net	172,125	64,548
Lighting Segment [Member]
Goodwill	70,971	70,971
Goodwill acquired, net of adjustments	0	0
Foreign currency translation	0	0
Accumulated impairment losses	(61,763)	(61,763)
Goodwill, net	9,208	9,208
Display Solutions Segment [Member]
Goodwill	82,865	75,714
Goodwill acquired, net of adjustments	108,148	6,769
Foreign currency translation	(571)	382
Accumulated impairment losses	(27,525)	(27,525)
Goodwill, net	$ 162,917	$ 55,340