Note 2 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Net Sales	$ 157,249	$ 138,095
Lighting Segment [Member]
Net Sales	69,054	58,437
Lighting Segment [Member] | LED Lighting, Digital Signage, Electronic Circuit Boards [Member]
Net Sales	55,749	47,429
Lighting Segment [Member] | Poles, Other Display Solution Elements [Member]
Net Sales	12,733	10,393
Lighting Segment [Member] | Project Management, Installation Services, Shipping and Handling [Member]
Net Sales	572	615
Lighting Segment [Member] | Transferred at Point in Time [Member]
Net Sales	57,310	48,211
Lighting Segment [Member] | Transferred over Time [Member]
Net Sales	11,744	10,226
Display Solutions Segment [Member]
Net Sales	88,195	79,658
Display Solutions Segment [Member] | LED Lighting, Digital Signage, Electronic Circuit Boards [Member]
Net Sales	3,350	8,436
Display Solutions Segment [Member] | Poles, Other Display Solution Elements [Member]
Net Sales	70,359	55,703
Display Solutions Segment [Member] | Project Management, Installation Services, Shipping and Handling [Member]
Net Sales	14,486	15,519
Display Solutions Segment [Member] | Transferred at Point in Time [Member]
Net Sales	77,663	62,094
Display Solutions Segment [Member] | Transferred over Time [Member]
Net Sales	$ 10,532	$ 17,564