Note 3 - Segment Reporting Information - Summarized Financial Information by Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Net Sales	$ 123,441	$ 127,069
Operating Income (Loss)	11,028	10,021
Capital Expenditures	1,393	434
Depreciation and amortization	2,371	2,421
Corporate and Eliminations [Member]
Operating Income (Loss)	(4,944)	(5,633)
Capital Expenditures	12	23
Depreciation and amortization	86	60
Lighting Segment [Member]
Net Sales	67,641	67,533
Lighting Segment [Member] | Operating Segments [Member]
Operating Income (Loss)	8,753	9,158
Capital Expenditures	862	249
Depreciation and amortization	1,309	1,387
Display Solutions Segment [Member]
Net Sales	55,800	59,536
Display Solutions Segment [Member] | Operating Segments [Member]
Operating Income (Loss)	7,219	6,496
Capital Expenditures	519	162
Depreciation and amortization	$ 976	$ 974