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Note J - Long-term Debt (Details Textual) - USD ($)
3 Months Ended
Apr. 22, 2019
Jun. 29, 2018
Sep. 27, 2019
Principal Paid on Sale Leaseback Liabilities     $ 17,000
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Bank of Montreal [Member]      
Derivative, Notional Amount $ 20,000,000    
Derivative, Maturity Date Mar. 04, 2026    
Minimum [Member]      
Sale Leaseback Transactions, Term     3 years
Sale Leaseback Transactions, Implied Interest Rate     7.00%
Maximum [Member]      
Sale Leaseback Transactions, Term     5 years
Sale Leaseback Transactions, Implied Interest Rate     25.00%
BMO [Member] | The 2018 Credit Agreement [Member] | Revolving Credit Facility [Member]      
Line of Credit Facility, Maximum Borrowing Capacity   $ 50,000,000  
Debt Instrument, Interest Rate During Period     2.36%
Line of Credit Facility, Current Borrowing Capacity     $ 44,535
Line of Credit Facility, Remaining Borrowing Capacity     $ 14,776
BMO [Member] | The 2018 Credit Agreement [Member] | Term Loan [Member]      
Debt Instrument, Periodic Payment, Total   $ 500,000  
Debt Instrument, Maturity Date   Mar. 04, 2026  
Debt Instrument, Interest Rate During Period     3.62%