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Sale of Sunflower Business (Schedule of revenues and earnings (loss) before income taxes) (Details) - Sunflower Business [Member] - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Jan. 01, 2022 | Jan. 02, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Revenues | $ 57,924 | $ 63,094 | $ 54,618
Earnings (loss) before income taxes | $ 1,182 | $ 1,082 | $ (5,689)

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- Definition Amount of operating income (loss) attributable to disposal group, including, but not limited to, discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760 + Details
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- Details
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