Note 3 - Segment Reporting Information - Summarized Financial Information by Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Net Sales	$ 128,804	$ 111,143	$ 255,873	$ 217,540
Operating income (loss)	9,038	4,422	19,059	8,866
Capital expenditures	561	448	995	745
Depreciation and amortization	2,419	2,538	4,840	5,101
Corporate and Eliminations [Member]
Operating income (loss)	(5,478)	(4,038)	(11,111)	(7,682)
Capital expenditures	(52)	22	(28)	(82)
Depreciation and amortization	62	72	122	143
Lighting Segment [Member]
Net Sales	66,833	57,276	134,366	108,536
Lighting Segment [Member] | Operating Segments [Member]
Operating income (loss)	6,754	4,623	15,912	8,962
Capital expenditures	74	172	323	352
Depreciation and amortization	1,382	1,450	2,769	2,911
Display Solutions Segment [Member]
Net Sales	61,971	53,867	121,507	109,004
Display Solutions Segment [Member] | Operating Segments [Member]
Operating income (loss)	7,762	3,837	14,258	7,586
Capital expenditures	539	254	700	475
Depreciation and amortization	$ 975	$ 1,016	$ 1,949	$ 2,047