Note 1 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Net sales	$ 496,979	$ 455,120
Lighting Segment [Member]
Net sales	272,451	233,449
Lighting Segment [Member] | LED Lighting, Digital Signage, Electronic Circuit Boards [Member]
Net sales	224,529	191,791
Lighting Segment [Member] | Legacy Products [Member]
Net sales	44,473	39,339
Lighting Segment [Member] | Turnkey Services and Other [Member]
Net sales	3,449	2,319
Display Solutions Segment [Member]
Net sales	224,528	221,671
Display Solutions Segment [Member] | LED Lighting, Digital Signage, Electronic Circuit Boards [Member]
Net sales	25,011	44,771
Display Solutions Segment [Member] | Legacy Products [Member]
Net sales	156,057	136,573
Display Solutions Segment [Member] | Turnkey Services and Other [Member]
Net sales	43,460	40,327
Transferred at Point in Time [Member] | Lighting Segment [Member]
Net sales	234,736	204,241
Transferred at Point in Time [Member] | Display Solutions Segment [Member]
Net sales	177,564	156,241
Transferred over Time [Member] | Lighting Segment [Member]
Net sales	37,715	29,208
Transferred over Time [Member] | Display Solutions Segment [Member]
Net sales	$ 46,964	$ 65,430