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Note 8 - Shareholders' Equity (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Apr. 19, 2017
Sep. 30, 2014
Jul. 02, 2017
Jun. 26, 2016
Jul. 02, 2017
Jun. 26, 2016
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options     $ 616   $ 616  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value         $ 2.47  
Proceeds from Stock Options Exercised     248 $ 61 $ 989 $ 75
Excess Tax Benefit from Share-based Compensation, Financing Activities         $ 0 $ 0
Employee Stock Option [Member]            
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition         1 year 146 days  
Employee Stock Option [Member] | President [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Number of Shares 300,000          
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost     193      
Restricted Stock [Member] | 2014 Long-term Incentive Plan [Member]            
Stock Issued During Period, Shares, Restricted Stock Award, Gross   49,200        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period   3 years        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value   $ 3.24        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options     $ 3   $ 3