Note 2 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Revenue	$ 70,006	$ 88,701
Lighting Segment [Member]
Revenue	45,405	63,191
Lighting Segment [Member] | LED Lighting, Digital Signage, Electronic Circuit Boards [Member]
Revenue	37,869
Lighting Segment [Member] | Legacy Products [Member]
Revenue	7,074
Lighting Segment [Member] | Turnkey Services and Other [Member]
Revenue	462
Graphics Segment [Member]
Revenue	24,601	$ 25,510
Graphics Segment [Member] | LED Lighting, Digital Signage, Electronic Circuit Boards [Member]
Revenue	5,081
Graphics Segment [Member] | Legacy Products [Member]
Revenue	14,325
Graphics Segment [Member] | Turnkey Services and Other [Member]
Revenue	5,195
Transferred at Point in Time [Member] | Lighting Segment [Member]
Revenue	40,040
Transferred at Point in Time [Member] | Graphics Segment [Member]
Revenue	14,454
Transferred over Time [Member] | Lighting Segment [Member]
Revenue	5,365
Transferred over Time [Member] | Graphics Segment [Member]
Revenue	$ 10,147