Note 3 - Business Segment Information (Details) - Summarized Financial Information by Reportable Business Segments (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2013		Dec. 31, 2012
Segment Reporting Information [Line Items]
Net Sales	$ 76,123	[1]	$ 71,082	[1]	$ 156,609	[1]	$ 145,801	[1]
Operating Income (Loss)	1,511		(2,709)		4,350		318
Capital Expenditures	1,491		1,797		2,721		3,133
Depreciation and Amortization	1,561		1,826		2,969		3,676
Lighting Segment [Member]
Segment Reporting Information [Line Items]
Net Sales	57,380		53,743		116,851		109,534
Operating Income (Loss)	2,157		2,477		5,968		6,990
Capital Expenditures	696		578		1,187		894
Depreciation and Amortization	703		1,139		1,409		2,304
Graphics Segment [Member]
Segment Reporting Information [Line Items]
Net Sales	12,954		10,532		26,962		21,277
Operating Income (Loss)	(275)		(1,140)		(112)		(1,495)
Capital Expenditures	177		145		234		363
Depreciation and Amortization	232		224		453		446
Electronics Components Segment [Member]
Segment Reporting Information [Line Items]
Net Sales	4,073		4,959		9,153		10,713
Operating Income (Loss)	1,041		(1,559)		2,013		(773)
Capital Expenditures	413		196		483		329
Depreciation and Amortization	367		333		733		653
All Other Category [Member]
Segment Reporting Information [Line Items]
Net Sales	1,716		1,848		3,643		4,277
Operating Income (Loss)	124		(1,429)		128		(1,431)
Capital Expenditures	10		27		39		57
Depreciation and Amortization	42		46		82		93
Corporate and Eliminations [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)	(1,536)		(1,058)		(3,647)		(2,973)
Capital Expenditures	195		851		778		1,490
Depreciation and Amortization	$ 217		$ 84		$ 292		$ 180

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