Note 2 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Revenue	$ 82,377	$ 89,541	$ 171,078	$ 174,498
Lighting Segment [Member]
Revenue	53,436	63,654	116,627	125,086
Lighting Segment [Member] | LED Lighting, Digital Signage, Electronic Circuit Boards [Member]
Revenue	46,596		101,079
Lighting Segment [Member] | Legacy Products [Member]
Revenue	6,265		14,303
Lighting Segment [Member] | Turnkey Services and Other [Member]
Revenue	575		1,245
Graphics Segment [Member]
Revenue	28,941	$ 25,887	54,451	$ 49,412
Graphics Segment [Member] | LED Lighting, Digital Signage, Electronic Circuit Boards [Member]
Revenue	7,407		11,281
Graphics Segment [Member] | Legacy Products [Member]
Revenue	16,011		32,711
Graphics Segment [Member] | Turnkey Services and Other [Member]
Revenue	5,523		10,459
Transferred at Point in Time [Member] | Lighting Segment [Member]
Revenue	47,513		104,038
Transferred at Point in Time [Member] | Graphics Segment [Member]
Revenue	17,521		35,246
Transferred over Time [Member] | Lighting Segment [Member]
Revenue	5,923		12,589
Transferred over Time [Member] | Graphics Segment [Member]
Revenue	$ 11,420		$ 19,205