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Note 9 - Long-term Debt (Details Textual)
3 Months Ended 9 Months Ended
Jul. 01, 2017
USD ($)
Jul. 02, 2016
USD ($)
Jul. 01, 2017
USD ($)
Jul. 02, 2016
USD ($)
Oct. 01, 2016
USD ($)
Feb. 06, 2012
USD ($)
Accumulated Amortization, Debt Issuance Costs $ 4,600,000   $ 4,600,000   $ 4,500,000  
Amortization of Debt Issuance Costs 16,000 $ 16,000 48,000 $ 48,000    
Revolving Credit Facility [Member]            
Line of Credit Facility, Maximum Borrowing Capacity           $ 100,000,000
Long-term Line of Credit 0   0      
Line of Credit Facility, Current Borrowing Capacity $ 90,100,000   $ 90,100,000      
Debt Instrument, Interest Rate, Increase (Decrease)     2.00%      
Fixed Charge Coverage Ratio     1.1      
Credit Facility, Liquidity Amount     $ 12,500,000      
Revolving Credit Facility [Member] | Federal Funds Effective Swap Rate [Member]            
Debt Instrument, Basis Spread on Variable Rate     0.50%      
Revolving Credit Facility [Member] | Base Rate [Member]            
Line of Credit Facility, Interest Rate at Period End 0.25%   0.25%      
Revolving Credit Facility [Member] | Base Rate [Member] | Minimum [Member]            
Debt Instrument, Basis Spread on Variable Rate     0.25%      
Revolving Credit Facility [Member] | Base Rate [Member] | Maximum [Member]            
Debt Instrument, Basis Spread on Variable Rate     0.75%      
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]            
Line of Credit Facility, Interest Rate at Period End 1.25%   1.25%      
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]            
Debt Instrument, Basis Spread on Variable Rate     1.25%      
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]            
Debt Instrument, Basis Spread on Variable Rate     1.75%      
Revolving Credit Facility [Member] | Letter of Credit [Member]            
Long-term Line of Credit $ 1,800,000   $ 1,800,000