Note 2 - Business Segment Information - Summarized Financial Information by Reportable Business Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Net sales	$ 328,852	$ 342,023
Operating income (loss)	(19,890)	(21,652)
Capital Expenditures:
Capital expenditures	2,618	3,406
Depreciation and Amortization:
Depreciation and amortization	10,221	10,222
Corporate and Eliminations [Member]
Operating income (loss)	(10,791)	(14,475)
Capital Expenditures:
Capital expenditures	37	165
Depreciation and Amortization:
Depreciation and amortization	979	1,107
Lighting Segment [Member]
Net sales	235,114	260,613
Lighting Segment [Member] | Operating Segments [Member]
Operating income (loss)	(12,211)	(12,795)
Capital Expenditures:
Capital expenditures	2,239	2,203
Depreciation and Amortization:
Depreciation and amortization	7,648	7,573
Graphics Segment [Member]
Net sales	93,738	81,410
Graphics Segment [Member] | Operating Segments [Member]
Operating income (loss)	3,112	5,618
Capital Expenditures:
Capital expenditures	342	1,038
Depreciation and Amortization:
Depreciation and amortization	$ 1,594	$ 1,542