Note 14 - Restructuring Costs - Summary of Restructuring Costs by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Restructuring and related costs, incurred cost		$ 697		$ 1,353
Corporate, Non-Segment [Member]
Restructuring and related costs, incurred cost				111
Lighting Segment [Member] | Operating Segments [Member]
Restructuring and related costs, incurred cost		476		1,021
Graphics Segment [Member] | Operating Segments [Member]
Restructuring and related costs, incurred cost		$ 221		$ 221