Note 14 - Restrucuring Costs - Summary of Restructuring Costs by Segment (Details) $ in Thousands	Sep. 30, 2016 USD ($)
Lighting Segment [Member] | Operating Segments [Member]
Restructuring and related costs, costs incurred to date	$ 291
Total expected to be recognized in remainder of fiscal 2017	686
Total fiscal 2017 restructuring expenses	977
Graphics Segment [Member] | Operating Segments [Member]
Restructuring and related costs, costs incurred to date
Total expected to be recognized in remainder of fiscal 2017
Total fiscal 2017 restructuring expenses
Technology Segment [Member] | Operating Segments [Member]
Restructuring and related costs, costs incurred to date	254
Total expected to be recognized in remainder of fiscal 2017
Total fiscal 2017 restructuring expenses	254
Corporate, Non-Segment [Member]
Restructuring and related costs, costs incurred to date	111
Total expected to be recognized in remainder of fiscal 2017
Total fiscal 2017 restructuring expenses	111
Restructuring and related costs, costs incurred to date	656
Total expected to be recognized in remainder of fiscal 2017	686
Total fiscal 2017 restructuring expenses	$ 1,342