Note 11 - Stock-based Compensation 1 (Details Textual) - USD ($) shares in Thousands	3 Months Ended	6 Months Ended
Jun. 28, 2026	Jun. 29, 2025	Jun. 28, 2026	Jun. 29, 2025
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)			42
Share-Based Payment Arrangement, Expense	$ 754	$ 843	$ 1,612	$ 1,779
Employee Stock Purchase Plan [Member]
Employee Stock Ownership Plan (ESOP), Compensation Expense	48,000	20,000	$ 95,000	$ 60,000
Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)			42	0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)			0	0
Share-Based Payment Arrangement, Expense			$ 0	$ 0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period (in shares)			0	0
Restricted Stock Units (RSUs) [Member]
Share-Based Payment Arrangement, Expense	700,000	800,000	$ 1,500,000	$ 1,700,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 2,100,000	$ 1,900,000	$ 2,100,000	$ 1,900,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			11 months 26 days

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

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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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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