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Note 8 - Stockholders' Equity (Tables) | 3 Months Ended
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Dec. 31, 2023
Notes Tables |
Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block] |
|  | Three Months Ended December 31, |
|  | 2023 |  |  | 2022 |
Cost of revenue |  | $ | - |  |  | $ | 5 |
Operating expenses |  |  | 112 |  |  |  | 88 |
|  | $ | 112 |  |  | $ | 93 |
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] |
Type |  | Issue Date |  | Shares |  |  | Price |  | Expiration
Financing (Montage) |  | 10/10/2017 |  |  | 1,327 |  |  | $ | 132.50 |  | 10/10/2025
Investors |  | 3/12/2019 |  |  | 872,625 |  |  | $ | 4.00 |  | 9/12/2024
Investors |  | 3/12/2019 |  |  | 13,738 |  |  | $ | 0.05 |  | 9/12/2024
Placement Agent |  | 3/12/2019 |  |  | 11,992 |  |  | $ | 4.00 |  | 9/12/2024
Placement Agent |  | 2/4/2021 |  |  | 31,564 |  |  | $ | 3.88 |  | 2/4/2026
Investors |  | 5/14/2021 |  |  | 592,106 |  |  | $ | 2.51 |  | 11/16/2026
Placement Agent |  | 5/14/2021 |  |  | 179,536 |  |  | $ | 2.85 |  | 5/12/2026
|  |  |  |  | 1,702,888 |  |  |  |  |  |
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | Non-Board |
Weighted-average fair value per share option |  | $ | 1.12 |
Expected life (in years) |  |  | 6.0 |
Volatility |  |  | 108.5 | %
Risk-free interest rate |  |  | 3.8 | %
Dividend yield |  |  | 0.0 | %
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  | Restricted Stock |  |  | Stock Options |  |  | Stock Warrants |
|  | Awards |  |  | Awards |  |  | Weighted Average Exercise Price |  |  | Warrants |  |  | Weighted Average Exercise Price |
Outstanding, October 1, 2023 |  |  | 200,000 |  |  |  | 1,831,515 |  |  | $ | 2.56 |  |  |  | 1,757,629 |  |  | $ | 3.64 |
Granted |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Exercised |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Forfeited |  |  | - |  |  |  | (29,018 | ) |  |  | 1.58 |  |  |  | - |  |  |  | - |
Expired |  |  | - |  |  |  | (18 | ) |  |  | 1,362.50 |  |  |  | (54,741 | ) |  |  | 10.17 |
Outstanding, December 31, 2023 |  |  | 200,000 |  |  |  | 1,802,479 |  |  | $ | 2.56 |  |  |  | 1,702,888 |  |  | $ | 3.43 |
Options vested and exercisable, December 31, 2023 |  |  |  |  |  |  | 1,192,642 |  |  | $ | 3.14 |  |  |  |  |  |  |  |  |

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- Definition Tabular disclosure of share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-1 Reference 2: 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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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-1 + Details
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