Note 2 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Revenue	$ 76,387	$ 82,377	$ 146,393	$ 171,078
Lighting Segment [Member]
Revenue	45,126	53,436	90,531	116,627
Lighting Segment [Member] | LED Lighting, Digital Signage, Electronic Circuit Boards [Member]
Revenue	40,514		78,383
Lighting Segment [Member] | Legacy Products [Member]
Revenue	4,154		11,228
Lighting Segment [Member] | Turnkey Services and Other [Member]
Revenue	458		920
Graphics Segment [Member]
Revenue	31,261	$ 28,941	55,862	$ 54,451
Graphics Segment [Member] | LED Lighting, Digital Signage, Electronic Circuit Boards [Member]
Revenue	6,870		11,951
Graphics Segment [Member] | Legacy Products [Member]
Revenue	15,392		29,717
Graphics Segment [Member] | Turnkey Services and Other [Member]
Revenue	8,999		14,194
Transferred at Point in Time [Member] | Lighting Segment [Member]
Revenue	39,941		79,981
Transferred at Point in Time [Member] | Graphics Segment [Member]
Revenue	15,987		30,441
Transferred over Time [Member] | Lighting Segment [Member]
Revenue	5,185		10,550
Transferred over Time [Member] | Graphics Segment [Member]
Revenue	$ 15,274		$ 25,421