Note 4 - Segment Reporting Information - Identifiable Assets by Segment (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Jun. 30, 2025
Total Assets	$ 404,873	$ 396,362
Corporate and Eliminations [Member]
Total Assets	8,908	10,103
Lighting Segment [Member] | Operating Segments [Member]
Total Assets	136,399	132,960
Display Solutions Segment [Member] | Operating Segments [Member]
Total Assets	$ 259,566	$ 253,299