Note 2 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Revenue	$ 117,470	$ 110,111	$ 373,343	$ 327,651
Lighting Segment [Member]
Revenue	66,707	57,126	201,074	165,662
Lighting Segment [Member] | LED Lighting, Digital Signage, Electronic Circuit Boards [Member]
Revenue	55,894	47,196	165,839	136,701
Lighting Segment [Member] | Legacy Products [Member]
Revenue	9,920	9,358	32,681	27,403
Lighting Segment [Member] | Turnkey Services and Other [Member]
Revenue	893	572	2,554	1,558
Lighting Segment [Member] | Transferred at Point in Time [Member]
Revenue	57,249	49,283	173,917	144,006
Lighting Segment [Member] | Transferred over Time [Member]
Revenue	9,458	7,843	27,157	21,656
Display Solutions Segment [Member]
Revenue	50,763	52,985	172,269	161,989
Display Solutions Segment [Member] | LED Lighting, Digital Signage, Electronic Circuit Boards [Member]
Revenue	4,907	6,906	17,883	31,885
Display Solutions Segment [Member] | Legacy Products [Member]
Revenue	37,019	35,536	120,173	99,965
Display Solutions Segment [Member] | Turnkey Services and Other [Member]
Revenue	8,837	10,543	34,213	30,139
Display Solutions Segment [Member] | Transferred at Point in Time [Member]
Revenue	42,378	41,231	136,894	114,099
Display Solutions Segment [Member] | Transferred over Time [Member]
Revenue	$ 8,385	$ 11,754	$ 35,375	$ 47,890