Note 4 - Segment Reporting Information - Summarized Financial Information by Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2025	Dec. 31, 2024
Revenue	$ 147,002	$ 147,734	$ 304,251	$ 285,829
Operating income	8,865	8,459	19,837	17,590
Long-term performance based compensation	1,002	1,669	2,284	2,853
Severance costs and restructuring costs	0		(71)	60
Amortization expense of acquired intangible assets	1,558	1,408	3,112	2,816
Acquisition costs	200		420	48
Expense on step-up basis of acquired assets	68	69	136	136
Adjusted operating income	11,693	11,686	25,718	23,584
Depreciation Expense	1,669	1,610	3,315	3,142
Adjusted EBITDA	13,362	13,296	29,033	26,726
Consulting expense: commercial growth initiatives		81		81
Capital expenditures	1,684	1,066	2,651	1,825
Depreciation and amortization	3,227	3,018	6,427	5,958
Lighting Segment [Member]
Revenue	66,673	58,210	135,726	116,646
Display Solutions Segment [Member]
Revenue	80,329	89,524	168,525	169,183
Operating Segments [Member] | Lighting Segment [Member]
Revenue	66,673	58,210	135,726	116,646
Operating income	7,547	5,971	16,096	11,730
Long-term performance based compensation	81	141	190	210
Severance costs and restructuring costs	(1)		17	60
Amortization expense of acquired intangible assets	603	603	1,206	1,206
Acquisition costs	0		0	0
Expense on step-up basis of acquired assets	0	0	0	0
Adjusted operating income	8,230	6,715	17,509	13,206
Depreciation Expense	658	642	1,331	1,286
Adjusted EBITDA	8,888	7,357	18,840	14,492
Consulting expense: commercial growth initiatives		0		0
Capital expenditures	449	509	738	1,221
Depreciation and amortization	1,275	1,281	2,537	2,493
Operating Segments [Member] | Display Solutions Segment [Member]
Revenue	80,329	89,524	168,525	169,183
Operating income	6,076	8,125	14,667	15,833
Long-term performance based compensation	259	358	474	643
Severance costs and restructuring costs	2		(88)	0
Amortization expense of acquired intangible assets	955	805	1,906	1,610
Acquisition costs	0		0	0
Expense on step-up basis of acquired assets	68	69	136	136
Adjusted operating income	7,360	9,357	17,095	18,222
Depreciation Expense	896	835	1,784	1,682
Adjusted EBITDA	8,256	10,192	18,879	19,904
Consulting expense: commercial growth initiatives		0		0
Capital expenditures	1,200	529	1,811	576
Depreciation and amortization	1,849	1,656	3,690	3,291
Corporate and Eliminations [Member]
Revenue	0	0	0	0
Operating income	(4,758)	(5,637)	(10,926)	(9,973)
Long-term performance based compensation	662	1,170	1,620	2,000
Severance costs and restructuring costs	(1)		0	0
Amortization expense of acquired intangible assets	0	0	0	0
Acquisition costs	200		420	48
Expense on step-up basis of acquired assets	0	0	0	0
Adjusted operating income	(3,897)	(4,386)	(8,886)	(7,844)
Depreciation Expense	115	133	200	174
Adjusted EBITDA	(3,782)	(4,253)	(8,686)	(7,670)
Consulting expense: commercial growth initiatives		81		81
Capital expenditures	35	28	102	28
Depreciation and amortization	$ 103	$ 81	$ 200	$ 174