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Note 3 - Acquisition of Businesses (Details) - Accel AB Purchase Price Allocation (USD $)
In Thousands, unless otherwise specified
Sep. 28, 2013
Dec. 29, 2012
Jun. 29, 2013
Accel AB [Member]
Distribution Rights [Member]
Jun. 29, 2013
Accel AB [Member]
Trademarks [Member]
Jun. 29, 2013
Accel AB [Member]
Patents and Licenses [Member]
Jun. 29, 2013
Accel AB [Member]
Note 3 - Acquisition of Businesses (Details) - Accel AB Purchase Price Allocation [Line Items]            
Cash           $ 344
Current assets, net           8,643
Property, plant and equipment           3,731
Other assets           7
Goodwill 186,667 133,592       11,536
Amortizable intangible assets     1,321 1,259 2,435  
Current liabilities           (5,411)
          $ 23,865