Note 1 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Revenue	$ 455,120	$ 315,612
Lighting Segment [Member]
Revenue	233,449	189,000
Lighting Segment [Member] | LED Lighting, Digital Signage, Electronic Circuit Boards [Member]
Revenue	191,791	164,778
Lighting Segment [Member] | Legacy Products [Member]
Revenue	39,339	22,492
Lighting Segment [Member] | Turnkey Services and Other [Member]
Revenue	2,319	1,730
Display Solutions Segment [Member]
Revenue	221,671	126,612
Display Solutions Segment [Member] | LED Lighting, Digital Signage, Electronic Circuit Boards [Member]
Revenue	44,771	35,976
Display Solutions Segment [Member] | Legacy Products [Member]
Revenue	136,573	61,919
Display Solutions Segment [Member] | Turnkey Services and Other [Member]
Revenue	40,327	28,717
Transferred at Point in Time [Member] | Lighting Segment [Member]
Revenue	204,241	165,062
Transferred at Point in Time [Member] | Display Solutions Segment [Member]
Revenue	156,241	66,123
Transferred over Time [Member] | Lighting Segment [Member]
Revenue	29,208	23,938
Transferred over Time [Member] | Display Solutions Segment [Member]
Revenue	$ 65,430	$ 60,489