Note 3 - Business Segment Information (Detail) - Summarized Financial Information by Reportable Business Segments (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Mar. 31, 2013		Mar. 31, 2012		Mar. 31, 2013		Mar. 31, 2012
Net Sales	$ 66,152	[1]	$ 62,937	[1]	$ 211,953	[1]	$ 197,206	[1]
Operating Income (Loss)	(506)		94		(188)		3,491
Capital Expenditures	2,544		869		5,677		2,546
Depreciation and Amortization	1,738		1,908		5,414		5,852
Lighting Segment [Member]
Net Sales	47,372		46,714		156,906		149,411
Operating Income (Loss)	1,650		2,555		8,640		8,691
Capital Expenditures	721		376		1,615		1,315
Depreciation and Amortization	1,062		1,251		3,366		3,709
Graphics Segment [Member]
Net Sales	13,110		8,940		34,387		29,519
Operating Income (Loss)	5		(767)		(1,490)		(2,216)
Capital Expenditures			48		363		494
Depreciation and Amortization	230		221		676		661
Electronics Components Segment [Member]
Net Sales	4,395		4,609		15,108		13,228
Operating Income (Loss)	(372)		1,057		(1,145)		2,811
Capital Expenditures	982		228		1,311		339
Depreciation and Amortization	331		274		984		804
All Other Category [Member]
Net Sales	1,275		2,674		5,552		5,048
Operating Income (Loss)	(186)		(680)		(1,617)		(1,047)
Capital Expenditures	41		29		98		163
Depreciation and Amortization	46		55		139		165
Corporate and Eliminations [Member]
Operating Income (Loss)	(1,603)		(2,071)		(4,576)		(4,748)
Capital Expenditures	800		188		2,290		235
Depreciation and Amortization	$ 69		$ 107		$ 249		$ 513

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