Note 5 - Long-term Debt (Details Textual) - USD ($) $ in Thousands		9 Months Ended
May 17, 2019	Oct. 02, 2021	Sep. 26, 2020
Repayments of Long-term Debt, Total		$ 8,750	$ 26,250
Credit Agreement, May 17, 2019 [Member] \| Revolving Credit Facility [Member]
Debt Instrument, Term (Year)	5 years
Line of Credit Facility, Maximum Borrowing Capacity	$ 75,000
Debt Instrument, Interest Rate, Effective Percentage		1.33%
Line of Credit Facility, Commitment Fee Percentage		0.20%
Credit Agreement, May 17, 2019 [Member] \| Secured Term Loan [Member]
Debt Instrument, Face Amount	$ 175,000
Repayments of Long-term Debt, Total		$ 8,800
Debt Instrument, Interest Rate, Effective Percentage		1.55%

Face (par) amount of debt instrument at time of issuance.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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