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Note 5 - Other Intangible Assets (Details Textual) - USD ($)
 12 Months Ended
Dec. 31, 2016
Jan. 02, 2016
Jan. 03, 2015
Trademarks And Intellectual Property [Member]      
Finite-Lived Intangible Asset, Useful Life 3 years    
Amortization of Intangible Assets $ 900,000 $ 500,000 $ 300,000
Other Intangible Assets [Member]      
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 900,000    
Finite-Lived Intangible Assets, Amortization Expense, Year Two 700,000    
Finite-Lived Intangible Assets, Amortization Expense, Year Three 100,000    
Finite-Lived Intangible Assets, Amortization Expense, Year Four 0    
Finite-Lived Intangible Assets, Amortization Expense, Year Five $ 0