Note 7 - Goodwill And Other Intangible Assets (Detail) - Other Intangible Assets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Jun. 30, 2012
Accumulated Amortization	$ 18,456	$ 16,539
Gross Carrying Amount	27,613	27,613
Accumulated Amortization	18,456	16,539
Net Amount	9,157	11,074
Trademarks and Trade Names [Member]
Gross Carrying Amount	3,422	3,422
Net Amount	3,422	3,422
Indefinite Lived Intangible Assets [Member]
Gross Carrying Amount	3,422	3,422
Net Amount	3,422	3,422
Customer Relationships [Member]
Gross Carrying Amount	10,352	10,352
Accumulated Amortization	6,983	6,538
Net Amount	3,369	3,814
Accumulated Amortization	6,983	6,538
Patents [Member]
Gross Carrying Amount	70	70
Accumulated Amortization	54	51
Net Amount	16	19
Accumulated Amortization	54	51
LED Technology Firmware, Software [Member]
Gross Carrying Amount	12,361	12,361
Accumulated Amortization	10,523	9,225
Net Amount	1,838	3,136
Accumulated Amortization	10,523	9,225
Trade Names [Member]
Gross Carrying Amount	460	460
Accumulated Amortization	339	270
Net Amount	121	190
Accumulated Amortization	339	270
Noncompete Agreements [Member]
Gross Carrying Amount	948	948
Accumulated Amortization	557	455
Net Amount	391	493
Accumulated Amortization	557	455
Amortized Intangible Assets [Member]
Gross Carrying Amount	24,191	24,191
Accumulated Amortization	18,456	16,539
Net Amount	5,735	7,652
Accumulated Amortization	$ 18,456	$ 16,539