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Note 7 - Goodwill and Other Intangible Assets, Net (Details Textual) - Licensing Agreements [Member] - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 28, 2014
Dec. 29, 2013
Finite-Lived Intangible Asset, Useful Life 15 years    
Amortization of Intangible Assets $ 2.3 $ 0.1 $ 0.1