Note 4 - Business Segment Information - Identifiable Assets by Segment (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Jun. 30, 2024
Total Assets	$ 396,362	$ 348,800
Corporate and Eliminations [Member]
Total Assets	10,103	9,857
Lighting Segment [Member] | Operating Segments [Member]
Total Assets	132,960	130,695
Display Solutions Segment [Member] | Operating Segments [Member]
Total Assets	$ 253,299	$ 208,248