Note 3 - Segment Reporting Information - Summarized Financial Information by Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Net Sales	$ 127,069	$ 106,397
Operating income loss	10,021	4,444
Capital expenditures	434	297
Depreciation and amortization	2,421	2,563
Corporate and Eliminations [Member]
Operating income loss	(5,633)	(3,644)
Capital expenditures	23	(104)
Depreciation and amortization	60	71
Lighting Segment [Member]
Net Sales	67,533	51,260
Lighting Segment [Member] | Operating Segments [Member]
Operating income loss	9,158	4,339
Capital expenditures	249	180
Depreciation and amortization	1,387	1,461
Display Solutions Segment [Member]
Net Sales	59,536	55,137
Display Solutions Segment [Member] | Operating Segments [Member]
Operating income loss	6,496	3,749
Capital expenditures	162	221
Depreciation and amortization	$ 974	$ 1,031