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Note 6 - Share-based Compensation (Details Textual) - shares | 3 Months Ended | 6 Months Ended
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Mar. 29, 2025 | Mar. 30, 2024 | Mar. 29, 2025 | Mar. 30, 2024
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |  |  | 0 | 0
Five Year Options [Member] |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award Fair Value Assumptions Volatility Calculation Term | 51 months |  |  |
Ten Year Options [Member] |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award Fair Value Assumptions Volatility Calculation Term | 10 years |  |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |  |  |  | 11,546
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares) |  | 1,795 | 13,557 |
Performance Shares [Member] |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |  |  |  | 11,538
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares) |  | 1,795 | 13,548 |

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- Definition The term calculated for volatility in fair value assumptions. + References No definition available. + Details
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- Definition Gross number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Number of shares issued under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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