Note 3 - Business Segment Information (Details) - Summarized Financial Information by Reportable Business Segments (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Mar. 31, 2014		Mar. 31, 2013
Segment Reporting Information [Line Items]
Net Sales	$ 68,996	[1]	$ 66,152	[1]	$ 225,605	[1]	$ 211,953	[1]
Operating Income (Loss)	(946)		(506)		3,404		(188)
Capital Expenditures	1,807		2,544		4,528		5,677
Depreciation and Amortization	1,614		1,738		4,583		5,414
Lighting Segment [Member]
Segment Reporting Information [Line Items]
Net Sales	53,013		47,372		169,864		156,906
Operating Income (Loss)	1,829		1,650		7,797		8,640
Capital Expenditures	1,605		721		2,792		1,615
Depreciation and Amortization	704		1,062		2,113		3,366
Graphics Segment [Member]
Segment Reporting Information [Line Items]
Net Sales	9,894		13,110		36,856		34,387
Operating Income (Loss)	(1,656)		5		(1,768)		(1,490)
Capital Expenditures	127				361		363
Depreciation and Amortization	243		230		696		676
Electronics Components Segment [Member]
Segment Reporting Information [Line Items]
Net Sales	5,060		4,395		14,213		15,108
Operating Income (Loss)	498		(372)		2,511		(1,145)
Capital Expenditures	72		982		555		1,311
Depreciation and Amortization	379		331		1,112		984
All Other Category [Member]
Segment Reporting Information [Line Items]
Net Sales	1,029		1,275		4,672		5,552
Operating Income (Loss)	(152)		(186)		(24)		(1,617)
Capital Expenditures			41		39		98
Depreciation and Amortization	45		46		127		139
Corporate and Eliminations [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)	(1,465)		(1,603)		(5,112)		(4,576)
Capital Expenditures	3		800		781		2,290
Depreciation and Amortization	$ 243		$ 69		$ 535		$ 249

[1] Net sales are attributed to geographic areas based upon the location of the operation making the sale.