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Note 13 - Related-Party Transactions (Details Textual) - USD ($)
$ in Millions
12 Months Ended
Jan. 02, 2016
Jan. 03, 2015
Dec. 28, 2013
Jan. 03, 2016
Charitable Contribution Collected on Behalf of Related Party [Member] | Charitable Foundations Controlled by Executive Officers [Member]        
Related Party Transaction, Amounts of Transaction $ 0.5 $ 1.2 $ 2.1  
Charitable Foundations Controlled by Executive Officers [Member]        
Due to Related Parties       $ 0.4
Related Party Transaction, Purchases from Related Party $ 0.9 $ 0.7 $ 1.3