Note 2 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Revenue	$ 71,010	$ 72,832	$ 242,088	$ 247,330
Lighting Segment [Member]
Revenue	49,013	52,785	165,640	177,871
Lighting Segment [Member] | LED Lighting, Digital Signage, Electronic Circuit Boards [Member]
Revenue	42,536		143,615
Lighting Segment [Member] | Legacy Products [Member]
Revenue	5,949		20,252
Lighting Segment [Member] | Turnkey Services and Other [Member]
Revenue	528		1,773
Graphics Segment [Member]
Revenue	21,997	$ 20,047	76,448	$ 69,459
Graphics Segment [Member] | LED Lighting, Digital Signage, Electronic Circuit Boards [Member]
Revenue	2,234		13,515
Graphics Segment [Member] | Legacy Products [Member]
Revenue	14,444		47,155
Graphics Segment [Member] | Turnkey Services and Other [Member]
Revenue	5,319		15,778
Transferred at Point in Time [Member] | Lighting Segment [Member]
Revenue	43,222		147,260
Transferred at Point in Time [Member] | Graphics Segment [Member]
Revenue	15,093		50,339
Transferred over Time [Member] | Lighting Segment [Member]
Revenue	5,791		18,380
Transferred over Time [Member] | Graphics Segment [Member]
Revenue	$ 6,904		$ 26,109