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Note 6 - Goodwill and Intangible Assets (Details)
3 Months Ended 6 Months Ended
Sep. 27, 2015
USD ($)
Mar. 29, 2015
USD ($)
Dec. 28, 2014
USD ($)
Sep. 28, 2014
USD ($)
Sep. 28, 2014
USD ($)
Note 6 - Goodwill and Intangible Assets (Details) [Line Items]          
Goodwill, Impairment Loss (in Dollars) $ 0        
IPR&D Reclassified to Existing Technology (in Dollars) $ 2,900,000   $ 1,200,000    
Number of Abandoned IPR&D Projects   2      
Impairment of Intangible Assets (Excluding Goodwill) (in Dollars)       $ 12,300,000 $ 12,284,000
Existing Technology [Member] | Minimum [Member]          
Note 6 - Goodwill and Intangible Assets (Details) [Line Items]          
Finite-Lived Intangible Asset, Useful Life 4 years        
Existing Technology [Member] | Maximum [Member]          
Note 6 - Goodwill and Intangible Assets (Details) [Line Items]          
Finite-Lived Intangible Asset, Useful Life 9 years        
Customer Relationships [Member] | Minimum [Member]          
Note 6 - Goodwill and Intangible Assets (Details) [Line Items]          
Finite-Lived Intangible Asset, Useful Life 5 years        
Customer Relationships [Member] | Maximum [Member]          
Note 6 - Goodwill and Intangible Assets (Details) [Line Items]          
Finite-Lived Intangible Asset, Useful Life 7 years        
Distribution Rights [Member]          
Note 6 - Goodwill and Intangible Assets (Details) [Line Items]          
Finite-Lived Intangible Asset, Useful Life 7 years        
Patented Technology [Member]          
Note 6 - Goodwill and Intangible Assets (Details) [Line Items]          
Finite-Lived Intangible Asset, Useful Life 6 years        
Trade Names [Member] | Minimum [Member]          
Note 6 - Goodwill and Intangible Assets (Details) [Line Items]          
Finite-Lived Intangible Asset, Useful Life 3 years        
Trade Names [Member] | Maximum [Member]          
Note 6 - Goodwill and Intangible Assets (Details) [Line Items]          
Finite-Lived Intangible Asset, Useful Life 6 years        
In Process Research and Development [Member]          
Note 6 - Goodwill and Intangible Assets (Details) [Line Items]          
Impairment of Intangible Assets (Excluding Goodwill) (in Dollars)   $ 2,800,000