Quarterly report pursuant to Section 13 or 15(d)

Note F - Line of Credit (Details Textual)

v3.21.1
Note F - Line of Credit (Details Textual) - Line of Credit [Member] - USD ($)
$ in Thousands
3 Months Ended
Apr. 21, 2021
Apr. 03, 2021
Line of Credit Facility, Maximum Borrowing Capacity   $ 75,000
Line of Credit Facility, Additional Increase in Maximum Borrowing Capacity   200,000
Long-term Line of Credit, Total   0
Amended and Restated Credit Agreement [Member]    
Debt Instrument Covenant, Adjusted Earnings Before Interest Taxes, Depreciation, and Amortization   $ 100,000
Debt Instrument, Covenant Ratio of Consolidated Funded Debt to Adjusted Earnings Before Interest, Taxes, Depreciation, and Amortization   2.0
Debt Instrument, First Borrowing Term (Week)   7 days
Debt Instrument, Second Borrowing Term (Week)   14 days
Amended and Restated Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]    
Debt Instrument, Basis Spread on Variable Rate   0.50%
Amended and Restated Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Subsequent Event [Member]    
Debt Instrument, Basis Spread on Variable Rate 0.00%