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Note 6 - Goodwill and Other Intangible Assets (Details Textual)
12 Months Ended
Mar. 01, 2016
USD ($)
Mar. 01, 2015
USD ($)
Jun. 30, 2014
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Sep. 30, 2014
USD ($)
Lighting Segment [Member]            
Good will Impairment Testing Value Above Carrying Value $ 89,000,000 $ 36,200,000        
Good will Impairment Testing Percent Value Above Carrying Value 112.00% 45.00%        
Graphics Segment [Member]            
Good will Impairment Testing Value Above Carrying Value $ 1,700,000 $ 4,000,000        
Good will Impairment Testing Percent Value Above Carrying Value 183.00% 344.00%        
Technology Segment [Member]            
Good will Impairment Testing Value Above Carrying Value $ 15,400,000 $ 14,900,000        
Good will Impairment Testing Percent Value Above Carrying Value 59.00% 58.00%        
Customer Relationships [Member] | LSI Saco [Member]            
Finite-Lived Intangible Assets, Gross           $ 1,306,000
Finite-Lived Intangible Assets, Accumulated Amortization           $ 428,000
Customer Relationships [Member]            
Finite-Lived Intangible Assets, Gross       $ 9,316,000 $ 9,316,000  
Finite-Lived Intangible Assets, Accumulated Amortization       7,581,000 7,290,000  
Impairment of Long-Lived Assets Held-for-use $ 0 $ 0        
Number of Reporting Units   3        
Impairment of Intangible Assets, Finite-lived     $ 805,000      
Finite-Lived Intangible Assets, Gross       22,052,000 22,052,000  
Finite-Lived Intangible Assets, Accumulated Amortization       $ 19,888,000 $ 19,382,000  
Indefinite Lived Intangible Assets Impairment Testing Value Above Carrying Value $ 8,400,000 $ 6,600,000        
Indefinite Lived Intangible Assets Impairment Testing Percent Value Above Carrying Value 245.00% 192.00%