Note 5 - Segment Reporting Information - Identifiable Assets by Segment (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Jun. 30, 2024
Total Assets	$ 384,565	$ 348,800
Corporate and Eliminations [Member]
Total Assets	10,020	9,857
Lighting Segment [Member] | Operating Segments [Member]
Total Assets	122,109	130,695
Display Solutions Segment [Member] | Operating Segments [Member]
Total Assets	$ 252,436	$ 208,248