Note 3 - Segment Reporting Information - Summarized Financial Information by Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Net Sales	$ 109,005	$ 128,804	$ 232,446	$ 255,873
Operating Income (Loss)	7,819	9,038	18,847	19,059
Capital Expenditures	1,956	561	3,349	995
Depreciation and amortization	2,357	2,419	4,728	4,840
Corporate and Eliminations [Member]
Operating Income (Loss)	(4,339)	(5,478)	(9,283)	(11,111)
Capital Expenditures	276	(52)	288	(28)
Depreciation and amortization	75	62	161	122
Lighting Segment [Member]
Net Sales	64,795	66,833	132,436	134,366
Lighting Segment [Member] | Operating Segments [Member]
Operating Income (Loss)	8,856	6,754	17,609	15,912
Capital Expenditures	1,151	74	2,013	323
Depreciation and amortization	1,293	1,382	2,602	2,769
Display Solutions Segment [Member]
Net Sales	44,210	61,971	100,010	121,507
Display Solutions Segment [Member] | Operating Segments [Member]
Operating Income (Loss)	3,302	7,762	10,521	14,258
Capital Expenditures	529	539	1,048	700
Depreciation and amortization	$ 989	$ 975	$ 1,965	$ 1,949