Note 8 - Long-term Debt (Details) (USD $)
3 Months Ended 12 Months Ended 0 Months Ended
Mar. 25, 2012
Dec. 28, 2014
Dec. 29, 2013
Dec. 30, 2012
Feb. 14, 2012
Note 8 - Long-term Debt (Details) [Line Items]          
Fixed Charge Coverage Ratio after Amendment         1.25
Maximum Leverage Ratio after Amendment         2.50
Debt Instrument Covenants on Cash Dividend Payments and Repurchases of Common or Preferred Stock   $ 100,000,000      
Debt Covenant Limit Used for Cash Dividends and Repurchases of Common or Preferred Stock   26,800,000      
Legal Fees 100,000        
Write off of Deferred Debt Issuance Cost 807,000 0 0 807,000  
Amended and Restated Credit Agreement [Member] | Senior Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]          
Note 8 - Long-term Debt (Details) [Line Items]          
Debt Instrument, Basis Spread on Variable Rate         2.00%
Amended and Restated Credit Agreement [Member] | Senior Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]          
Note 8 - Long-term Debt (Details) [Line Items]          
Debt Instrument, Basis Spread on Variable Rate         2.75%
Amended and Restated Credit Agreement [Member] | Senior Credit Facility [Member] | Base Rate [Member] | Minimum [Member]          
Note 8 - Long-term Debt (Details) [Line Items]          
Debt Instrument, Basis Spread on Variable Rate         1.00%
Amended and Restated Credit Agreement [Member] | Senior Credit Facility [Member] | Base Rate [Member] | Maximum [Member]          
Note 8 - Long-term Debt (Details) [Line Items]          
Debt Instrument, Basis Spread on Variable Rate         1.75%
Senior Credit Facility [Member]          
Note 8 - Long-term Debt (Details) [Line Items]          
Long-term Line of Credit   13,000,000      
Long-term Debt, Weighted Average Interest Rate   4.16%      
Line of Credit Facility, Remaining Borrowing Capacity   82,800,000      
Letter of Credit [Member]          
Note 8 - Long-term Debt (Details) [Line Items]          
Letters of Credit Outstanding, Amount   4,200,000      
Debt Instrument, Interest Rate, Stated Percentage   2.19%      
Line of Credit Facility, Maximum Borrowing Capacity   $ 100,000,000