Note 5 - Business Segment Information - Identifiable Assets by Segment (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Jun. 30, 2025
Identifiable assets	$ 829,864	$ 396,362
Deferred tax assets	30,130	19,809
Operating Segments [Member]
Identifiable assets	815,549	386,259
Deferred tax assets	0	7,302
Corporate and Eliminations [Member]
Identifiable assets	14,315	2,801
Lighting Segment [Member] | Operating Segments [Member]
Identifiable assets	139,921	132,960
Display Solutions Segment [Member] | Operating Segments [Member]
Identifiable assets	$ 675,628	$ 253,299