Note 4 - Segment Reporting Information - Identifiable Assets by Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Jun. 30, 2024
Total Assets	$ 344,545	$ 348,800
Corporate and Eliminations [Member]
Total Assets	9,715	9,857
Lighting Segment [Member] | Operating Segments [Member]
Total Assets	119,006	130,695
Display Solutions Segment [Member] | Operating Segments [Member]
Total Assets	$ 215,824	$ 208,248