Quarterly report pursuant to Section 13 or 15(d)

Note H - Derivative Financial Instruments (Details Textual)

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Note H - Derivative Financial Instruments (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 26, 2020
Sep. 28, 2019
Sep. 26, 2020
Sep. 28, 2019
Derivative, Notional Amount $ 90,000 $ 110,000 $ 90,000 $ 110,000
Derivative, Gain on Derivative 0 $ 0 846 $ 276
Derivative Assets (Liabilities), at Fair Value, Net, Total $ 0   $ 0