Note 8 - Stock-based Compensation (Details Textual) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended	6 Months Ended
Jul. 02, 2023	Jul. 03, 2022	Jul. 02, 2023	Jul. 03, 2022
Share-Based Payment Arrangement, Amount Capitalized			$ 61	$ 0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)			0	0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)			0	0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period (in shares)			2	0
Share-Based Payment Arrangement, Expense	$ 586	$ 477	$ 1,301	$ 860
Share-Based Payment Arrangement, Option [Member]
Share-Based Payment Arrangement, Expense			0	0
RSU and PRSU [Member]
Share-Based Payment Arrangement, Expense	600	500	1,200	900
Restricted Stock Units (RSUs) [Member]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	1,800	1,100	$ 1,800	1,100
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			1 year 2 months 4 days
Employee Stock Purchase Plan [Member]
Employee Stock Ownership Plan (ESOP), Compensation Expense	$ 16	$ 11	$ 75	$ 34

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of cost capitalized for award under share-based payment arrangement.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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The amount of plan compensation cost recognized during the period.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Gross number of share options (or share units) granted during the period.

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Number of share options (or share units) exercised during the current period.

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