Note 7 - Goodwill And Other Intangible Assets (Detail) - Goodwill (USD $)	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Sep. 30, 2012	Mar. 31, 2013	Mar. 31, 2012	Jun. 30, 2012
Goodwill	$ 78,343,000		$ 78,343,000		$ 78,343,000
Accumulated impairment Losses	(67,835,000)		(67,835,000)		(65,422,000)
Net Goodwill	10,508,000		10,508,000		12,921,000
Impairment losses	(272,000)	(258,000)	(2,413,000)	(258,000)
Lighting Segment [Member]
Goodwill	34,913,000		34,913,000		34,913,000
Accumulated impairment Losses	(34,778,000)		(34,778,000)		(34,778,000)
Net Goodwill	135,000		135,000		135,000
Graphics Segment [Member]
Goodwill	24,959,000		24,959,000		24,959,000
Accumulated impairment Losses	(24,959,000)		(24,959,000)		(24,959,000)
Electronics Components Segment [Member]
Goodwill	11,621,000		11,621,000		11,621,000
Accumulated impairment Losses	(2,413,000)		(2,413,000)
Net Goodwill	9,208,000		9,208,000		11,621,000
Impairment losses			(2,413,000)
All Other Category [Member]
Goodwill	6,850,000		6,850,000		6,850,000
Accumulated impairment Losses	(5,685,000)		(5,685,000)		(5,685,000)
Net Goodwill	$ 1,165,000		$ 1,165,000		$ 1,165,000