Note 1 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Net sales	$ 469,638	$ 496,979
Lighting Segment [Member]
Net sales	262,413	272,451
Lighting Segment [Member] | LED Lighting, Digital Signage, Electronic Circuit Boards [Member]
Net sales	215,758	224,529
Lighting Segment [Member] | Legacy Products [Member]
Net sales	43,719	44,473
Lighting Segment [Member] | Turnkey Services and Other [Member]
Net sales	2,936	3,449
Display Solutions Segment [Member]
Net sales	207,225	224,528
Display Solutions Segment [Member] | LED Lighting, Digital Signage, Electronic Circuit Boards [Member]
Net sales	32,521	25,011
Display Solutions Segment [Member] | Legacy Products [Member]
Net sales	132,604	156,057
Display Solutions Segment [Member] | Turnkey Services and Other [Member]
Net sales	42,100	43,460
Transferred at Point in Time [Member] | Lighting Segment [Member]
Net sales	219,820	234,736
Transferred at Point in Time [Member] | Display Solutions Segment [Member]
Net sales	151,972	177,564
Transferred over Time [Member] | Lighting Segment [Member]
Net sales	42,593	37,715
Transferred over Time [Member] | Display Solutions Segment [Member]
Net sales	$ 55,253	$ 46,964