Note 2- Business Segment Information (Details) - Summarized Financial Information by Reportable Business Segments (USD $) In Thousands, unless otherwise specified	3 Months Ended												12 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2011	Jun. 30, 2010
Segment Reporting Information [Line Items]
Net Sales	$ 73,858	$ 68,996	$ 76,123	$ 80,486	$ 68,837	$ 66,152	$ 71,082	$ 74,719	$ 71,196	$ 62,937	$ 68,774	$ 65,495	$ 299,463	[1]	$ 280,790	[1]	$ 268,402	[1]	$ 293,501	$ 254,402
Operating Income (Loss)													2,318		630		6,331		16,304	1,909
Capital Expenditures													5,245		7,571		3,436
Depreciation and Amortization													6,226		7,197		7,805
Lighting Segment [Member]
Segment Reporting Information [Line Items]
Net Sales													227,628		206,363		199,610
Operating Income (Loss)													9,788		10,092		11,828
Capital Expenditures													3,294		2,081		1,606
Depreciation and Amortization													2,845		4,434		4,953
Graphics Segment [Member]
Segment Reporting Information [Line Items]
Net Sales													46,166		46,770		42,131
Operating Income (Loss)													(2,802)		(1,253)		(1,938)
Capital Expenditures													461		350		576
Depreciation and Amortization													940		896		884
Electronics Components Segment [Member]
Segment Reporting Information [Line Items]
Net Sales													19,491		20,333		18,515
Operating Income (Loss)													2,369		(916)		3,634
Capital Expenditures													726		1,528		558
Depreciation and Amortization													1,497		1,357		1,130
All Other Category [Member]
Segment Reporting Information [Line Items]
Net Sales													6,178		7,324		8,146
Operating Income (Loss)													(138)		(1,451)		(1,114)
Capital Expenditures													20		115		182
Depreciation and Amortization													171		191		223
Corporate and Eliminations [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)													(6,899)		(5,842)		(6,079)
Capital Expenditures													744		3,497		514
Depreciation and Amortization													$ 773		$ 319		$ 615

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