Note 2 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Revenue	$ 128,804	$ 111,143	$ 255,873	$ 217,540
Lighting Segment [Member]
Revenue	66,833	57,276	134,366	108,536
Lighting Segment [Member] | LED Lighting, Digital Signage, Electronic Circuit Boards [Member]
Revenue	54,410	47,626	109,945	89,505
Lighting Segment [Member] | Legacy Products [Member]
Revenue	11,632	9,079	22,761	18,045
Lighting Segment [Member] | Turnkey Services and Other [Member]
Revenue	791	571	1,660	986
Lighting Segment [Member] | Transferred at Point in Time [Member]
Revenue	58,591	50,141	116,668	94,723
Lighting Segment [Member] | Transferred over Time [Member]
Revenue	8,242	7,135	17,698	13,813
Display Solutions Segment [Member]
Revenue	61,971	53,867	121,507	109,004
Display Solutions Segment [Member] | LED Lighting, Digital Signage, Electronic Circuit Boards [Member]
Revenue	5,801	12,551	12,976	24,979
Display Solutions Segment [Member] | Legacy Products [Member]
Revenue	41,683	31,127	83,154	64,429
Display Solutions Segment [Member] | Turnkey Services and Other [Member]
Revenue	14,487	10,189	25,377	19,596
Display Solutions Segment [Member] | Transferred at Point in Time [Member]
Revenue	47,027	35,437	94,516	72,868
Display Solutions Segment [Member] | Transferred over Time [Member]
Revenue	$ 14,944	$ 18,430	$ 26,991	$ 36,136