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Note 10 - Equity Compensation (Details) (USD $)
0 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Jul. 02, 2013
Jan. 02, 2013
Oct. 02, 2012
Apr. 02, 2012
Apr. 02, 2011
Jul. 02, 2010
Jun. 30, 2010
Dec. 31, 2013
Dec. 31, 2012
Jun. 30, 2013
Dec. 31, 2013
Employee Stock Option [Member]
Dec. 31, 2012
Employee Stock Option [Member]
Dec. 31, 2013
Employee Stock Option [Member]
Dec. 31, 2012
Employee Stock Option [Member]
Dec. 31, 2013
Minimum [Member]
Dec. 31, 2012
Minimum [Member]
Dec. 31, 2013
Maximum [Member]
Dec. 31, 2012
Maximum [Member]
Note 10 - Equity Compensation (Details) [Line Items]                                    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)               699,961                    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Share INcluded in Available for Grant Transferred From Previous Plan (in Shares)               337,148                    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number (in Shares)               2,714,700                    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number (in Shares)               1,908,337 1,668,975                  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized               $ 778,782                    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition               33 months                    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)               421,000 414,750                  
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share)               $ 7.20 $ 6.58                  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)               $ 2.64               $ 2.00   $ 2.11
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term               9 years 8 months               9 years 8 months   9 years 11 months
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit (in Dollars per share)                 $ 6.28                  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit (in Dollars per share)                 $ 6.58                  
Share-Based Compensation Valuation Assumptions Expected Forfeiture Rate 2.20% 2.30% 3.40% 4.10% 3.60% 3.00% 6.55%                      
Stock or Unit Option Plan Expense               779,000 638,000   93,635 119,654 779,294 638,047        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number (in Shares)               2,700,037                    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price (in Dollars per share)               $ 9.56                    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value               2,682,059                    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term               5 years 292 days                    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value               59,520 2,084                  
Proceeds from Stock Options Exercised               140,404 7,815                  
Reduction of Federal Income Taxes Payable Related To Stock Option Exercises               19,667                    
Increase In Common Stock Related To Stock Option Exercises               1,363                    
Reduction of Income Tax Expense Related To Stock Option Exercises               10,259                    
Reduction of Deferred Tax Asset Related to Stock Option Exercises               8,045                    
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period (in Shares)               11,575 5,204                  
Stock Issued During Period, Value, Share-based Compensation, Gross               95,000 36,000                  
Treasury Stock, Shares (in Shares)               308,662   288,505                
Treasury Stock, Value               2,931,149   2,791,000                
Treasury Stock, Value, Acquired, Cost Method               $ 149,800 $ 140,900                  
Treasury Stock, Shares, Acquired (in Shares)               20,157 20,922                  
Treasury Stock Acquired, Repurchase Authorization                             22,000   25,000