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Note 6 - Goodwill and Other Intangible Assets (Details Textual)
1 Months Ended 12 Months Ended
Mar. 01, 2017
USD ($)
Mar. 01, 2016
USD ($)
Mar. 31, 2017
USD ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Feb. 21, 2017
USD ($)
Sep. 30, 2014
USD ($)
Number of Reporting Units       3 3    
Goodwill       $ 58,538,000 $ 10,508,000    
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) $ 0 $ 0          
Intangible Assets, Indefinite-lived, Amount of Fair Value in Excess of Carrying Amount $ 15,200,000 $ 8,400,000          
Intangible Assets, Indefinite-lived, Percentage of Fair Value in Excess of Carrying Amount 445.00% 245.00%          
Finite-Lived Intangible Assets, Gross       55,335,000 22,052,000    
Finite-Lived Intangible Assets, Accumulated Amortization       20,588,000 19,888,000    
Customer Relationships [Member]              
Finite-Lived Intangible Assets, Gross       35,563,000 9,316,000    
Finite-Lived Intangible Assets, Accumulated Amortization       7,956,000 7,581,000    
Customer Relationships [Member] | LSI Saco [Member]              
Finite-Lived Intangible Assets, Gross             $ 1,306,000
Finite-Lived Intangible Assets, Accumulated Amortization             $ 428,000
Atlas Lighting Products, Inc. [Member]              
Goodwill       $ 48,030,000   $ 47,868,000  
Lighting Segment [Member]              
Number of Reporting Units       1      
Good will Impairment Testing Value Above Carrying Value       $ 60,000,000 $ 89,000,000    
Good will Impairment Testing Percent Value Above Carrying Value       80.00% 112.00%    
Goodwill       $ 48,165,000 $ 135,000    
Graphics Segment [Member]              
Number of Reporting Units       1 1    
Good will Impairment Testing Value Above Carrying Value       $ 4,200,000 $ 1,700,000    
Good will Impairment Testing Percent Value Above Carrying Value       424.00% 183.00%    
Goodwill       $ 1,165,000 $ 1,165,000    
Graphics Segment [Member] | Customer Relationships [Member]              
Impairment of Intangible Assets, Finite-lived     $ 479,000        
Finite-Lived Intangible Assets, Gross $ 479,000            
Technology Segment [Member]              
Good will Impairment Testing Value Above Carrying Value       $ 23,200,000 $ 15,400,000    
Good will Impairment Testing Percent Value Above Carrying Value       95.00% 59.00%    
Goodwill       $ 9,208,000 $ 9,208,000