Note 1 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Revenue	$ 305,558	$ 328,852
Lighting Segment [Member]
Revenue	206,199	235,114
Lighting Segment [Member] | LED Lighting, Digital Signage, Electronic Circuit Boards [Member]
Revenue	177,000
Lighting Segment [Member] | Legacy Products [Member]
Revenue	26,964
Lighting Segment [Member] | Turnkey Services and Other [Member]
Revenue	2,235
Graphics Segment [Member]
Revenue	99,359	$ 93,738
Graphics Segment [Member] | LED Lighting, Digital Signage, Electronic Circuit Boards [Member]
Revenue	15,075
Graphics Segment [Member] | Legacy Products [Member]
Revenue	62,409
Graphics Segment [Member] | Turnkey Services and Other [Member]
Revenue	21,875
Transferred at Point in Time [Member] | Lighting Segment [Member]
Revenue	181,613
Transferred at Point in Time [Member] | Graphics Segment [Member]
Revenue	66,605
Transferred over Time [Member] | Lighting Segment [Member]
Revenue	24,586
Transferred over Time [Member] | Graphics Segment [Member]
Revenue	$ 32,754