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Note J - Long-term Debt (Details Textual)
$ in Thousands
6 Months Ended
Dec. 31, 2021
USD ($)
Jun. 30, 2021
USD ($)
Mar. 04, 2019
Jun. 29, 2018
USD ($)
Long-term Debt, Current Maturities, Total $ 2,000 $ 2,000    
Principal Paid on Sale Leaseback Liabilities 43      
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Bank of Montreal [Member]        
Derivative, Notional Amount $ 14,500     $ 20,000
Minimum [Member]        
Sale Leaseback Transactions, Term (Year) 3 years      
Sale Leaseback Transactions, Implied Interest Rate 7.00%      
Maximum [Member]        
Sale Leaseback Transactions, Term (Year) 5 years      
Sale Leaseback Transactions, Implied Interest Rate 25.00%      
BMO [Member] | The 2018 Credit Agreement [Member]        
Long-term Debt, Current Maturities, Total $ 2,000      
BMO [Member] | The 2018 Credit Agreement [Member] | Revolving Credit Facility [Member]        
Debt Instrument, Interest Rate During Period 4.25%      
Line of Credit Facility, Current Borrowing Capacity $ 34,669      
Line of Credit Facility, Remaining Borrowing Capacity $ 24,035      
BMO [Member] | The 2018 Credit Agreement [Member] | Term Loan [Member]        
Debt Instrument, Covenant, Funded Debt to EBITDA Ratio     3.00  
Debt Instrument, Interest Rate During Period 3.96%