Note 4 - Segment Reporting Information - Summarized Financial Information by Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Net sales	$ 138,095	$ 123,441
Operating Income (Loss)	9,131	11,028
Capital Expenditures	759	1,393
Depreciation and amortization	2,940	2,371
Corporate and Eliminations [Member]
Operating Income (Loss)	(4,336)	(4,944)
Capital Expenditures	0	12
Depreciation and amortization	93	86
Lighting Segment [Member]
Net sales	58,437	67,641
Lighting Segment [Member] | Operating Segments [Member]
Operating Income (Loss)	5,759	8,753
Capital Expenditures	712	862
Depreciation and amortization	1,212	1,309
Display Solutions Segment [Member]
Net sales	79,658	55,800
Display Solutions Segment [Member] | Operating Segments [Member]
Operating Income (Loss)	7,708	7,219
Capital Expenditures	47	519
Depreciation and amortization	$ 1,635	$ 976