Note 3 - Segment Reporting Information - Identifiable Assets by Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Jun. 30, 2023
Total Assets	$ 287,548	$ 296,149
Corporate and Eliminations [Member]
Total Assets	10,077	7,901
Lighting Segment [Member] | Operating Segments [Member]
Total Assets	135,689	142,941
Display Solutions Segment [Member] | Operating Segments [Member]
Total Assets	$ 141,782	$ 145,307