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Note 2 - Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 28, 2025 | Jun. 29, 2025 | Sep. 29, 2024 | Sep. 28, 2025 | Sep. 28, 2025 | Sep. 29, 2024 | Dec. 29, 2024
Equity Method Investment, Other-than-Temporary Impairment |  | $ 300 |  | $ 300 |  | $ 0 |
Financing Receivable, Accrued Interest, after Allowance for Credit Loss | $ 0 |  |  | $ 0 | $ 0 |  | $ 0
Defined Contribution Plan, Cost | $ 41 |  | $ 47 |  | $ 126 | $ 47 |

X
- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 70 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480794/715-70-50-1 + Details
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- Definition Amount of other-than-temporary decline in value that has been recognized against investment accounted for under equity method of accounting. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481664/323-10-45-1 + Details
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- Definition Amount, after allowance for credit loss, of accrued interest on financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-5 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3A -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-3A + Details
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