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Note 5 - Other Intangible Assets (Details Textual) - USD ($)
 12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Trademarks And Intellectual Property [Member]      
Finite-Lived Intangible Asset, Useful Life 3 years    
Amortization of Intangible Assets $ 1,000,000 $ 900,000 $ 500,000
Other Intangible Assets [Member]      
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 800,000    
Finite-Lived Intangible Assets, Amortization Expense, Year Two 200,000    
Finite-Lived Intangible Assets, Amortization Expense, Year Three 0    
Finite-Lived Intangible Assets, Amortization Expense, Year Four 0    
Finite-Lived Intangible Assets, Amortization Expense, Year Five $ 0