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Note 6 - Goodwill And Other Intangible Assets (Details) - Other Intangible Assets (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Jun. 30, 2012
Note 6 - Goodwill And Other Intangible Assets (Details) - Other Intangible Assets [Line Items]    
Accumulated Amortization $ 19,034 $ 16,539
Gross Carrying Amount 27,613 27,613
Accumulated Amortization 19,034 16,539
Net Amount 8,579 11,074
Trademarks and Trade Names [Member]
    
Note 6 - Goodwill And Other Intangible Assets (Details) - Other Intangible Assets [Line Items]    
Gross Carrying Amount 3,422 3,422
Net Amount 3,422 3,422
Indefinite Lived Intangible Assets [Member]
    
Note 6 - Goodwill And Other Intangible Assets (Details) - Other Intangible Assets [Line Items]    
Gross Carrying Amount 3,422 3,422
Net Amount 3,422 3,422
Customer Relationships [Member]
    
Note 6 - Goodwill And Other Intangible Assets (Details) - Other Intangible Assets [Line Items]    
Gross Carrying Amount 10,352 10,352
Accumulated Amortization 7,068 6,538
Net Amount 3,284 3,814
Accumulated Amortization 7,068 6,538
Patents [Member]
    
Note 6 - Goodwill And Other Intangible Assets (Details) - Other Intangible Assets [Line Items]    
Gross Carrying Amount 70 70
Accumulated Amortization 55 51
Net Amount 15 19
Accumulated Amortization 55 51
LED Technology Firmware, Software [Member]
    
Note 6 - Goodwill And Other Intangible Assets (Details) - Other Intangible Assets [Line Items]    
Gross Carrying Amount 12,361 12,361
Accumulated Amortization 10,958 9,225
Net Amount 1,403 3,136
Accumulated Amortization 10,958 9,225
Trade Names [Member]
    
Note 6 - Goodwill And Other Intangible Assets (Details) - Other Intangible Assets [Line Items]    
Gross Carrying Amount 460 460
Accumulated Amortization 362 270
Net Amount 98 190
Accumulated Amortization 362 270
Noncompete Agreements [Member]
    
Note 6 - Goodwill And Other Intangible Assets (Details) - Other Intangible Assets [Line Items]    
Gross Carrying Amount 948 948
Accumulated Amortization 591 455
Net Amount 357 493
Accumulated Amortization 591 455
Total [Member]
    
Note 6 - Goodwill And Other Intangible Assets (Details) - Other Intangible Assets [Line Items]    
Gross Carrying Amount 24,191 24,191
Accumulated Amortization 19,034 16,539
Net Amount 5,157 7,652
Accumulated Amortization $ 19,034 $ 16,539