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Significant Accounting Policies (Schedule of consolidated statements of cash flows) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2022 | Oct. 01, 2022 | Jul. 02, 2022 | Apr. 02, 2022 | Jan. 01, 2022 | Oct. 02, 2021 | Jul. 03, 2021 | Apr. 03, 2021 | Dec. 31, 2022 | Jan. 01, 2022 | Jan. 02, 2021
Consolidated Statements of Cash Flows |  |  |  |  |  |  |  |  |  |  |
Earnings (loss) from continuing operations | $ (871) | $ (11,934) | $ 2,285 | $ 1,002 | $ (6,078) | $ (2,909) | $ 5,531 | $ 2,284 | $ (9,518) | $ (1,172) | $ (42,392)
Items not affecting cash: |  |  |  |  |  |  |  |  |  |  |
Deferred income taxes | (3,188) | (3,630) | 2,341 | (178) | 1,380 | 3,190 | (10,780) | 225 | (4,655) | (5,985) | 2,643
Changes in operating assets and liabilities | $ 15,854 | 2,003 | (22,452) | 3,191 | 13,807 | (5,494) | (50,322) | (21,656) | (1,404) | (63,665) | 17,131
Net cash provided by (used in) operating activities of continuing operations |  |  |  |  |  |  |  |  | $ 60,575 | (21,432) | 52,663
As Previously Reported [Member] |  |  |  |  |  |  |  |  |  |  |
Consolidated Statements of Cash Flows |  |  |  |  |  |  |  |  |  |  |
Earnings (loss) from continuing operations |  | (12,639) | 2,498 | 654 | (1,864) | (3,034) | (918) | 1,672 |  | (4,144) | (47,302)
Items not affecting cash: |  |  |  |  |  |  |  |  |  |  |
Deferred income taxes |  | (2,925) | 2,128 | 80 | (2,744) | 3,315 | (4,331) | 837 |  | (2,923) | 7,553
Changes in operating assets and liabilities |  | 2,003 | (22,452) | 3,281 | 13,717 | (5,494) | (50,322) | (21,656) |  | (63,755) | 17,131
Net cash provided by (used in) operating activities of continuing operations |  |  |  |  |  |  |  |  |  | (21,432) | 52,663
Adjustment [Member] |  |  |  |  |  |  |  |  |  |  |
Consolidated Statements of Cash Flows |  |  |  |  |  |  |  |  |  |  |
Earnings (loss) from continuing operations |  | 705 | (213) | 348 | (4,214) | 125 | 6,449 | 612 |  | 2,972 | 4,910
Items not affecting cash: |  |  |  |  |  |  |  |  |  |  |
Deferred income taxes |  | (705) | 213 | (258) | 4,124 | (125) | (6,449) | (612) |  | (3,062) | (4,910)
Changes in operating assets and liabilities |  | $ 0 | $ 0 | $ (90) | $ 90 | $ 0 | $ 0 | $ 0 |  | 90 | 0
Net cash provided by (used in) operating activities of continuing operations |  |  |  |  |  |  |  |  |  | $ 0 | $ 0

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