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Note 5 - Stock-based Compensation - Non-vested Restricted Stock Units (Details) - $ / shares | 3 Months Ended
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Dec. 26, 2023 | Dec. 27, 2022
Units granted during the quarter, shares (in shares) | 34,000 |
Units granted during the quarter, weighted average grant date fair value (in dollars per share) | $ 2.52 |
Non-vested units, grant date fair value per share (in dollars per share) | $ 2.52 |
Restricted Stock Units (RSUs) [Member] |  |
Non-vested units at beginning of year, shares (in shares) | 45,250 |
Units granted during the quarter, shares (in shares) | 34,000 | 25,750
Non-vested units, shares (in shares) | 79,250 |
Restricted Stock Units (RSUs) [Member] | Minimum [Member] |  |
Non-vested units at beginning of year, grant date fair value per share (in dollars per share) | $ 2.29 |
Units granted during the quarter, weighted average grant date fair value (in dollars per share) | 2.29 |
Non-vested units, grant date fair value per share (in dollars per share) | 2.29 |
Restricted Stock Units (RSUs) [Member] | Maximum [Member] |  |
Non-vested units at beginning of year, grant date fair value per share (in dollars per share) | 4.5 |
Units granted during the quarter, weighted average grant date fair value (in dollars per share) | 4.5 |
Non-vested units, grant date fair value per share (in dollars per share) | $ 4.5 |

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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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