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Note 4 - Fair Value Measurement and Fair Value of Financial Instruments (Tables) | 3 Months Ended
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Dec. 31, 2023
Notes Tables |
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] |
|  | As of December 31, 2023 |  |  | As of September 30, 2023 |
|  | Montage Capital |  |  | Series C Preferred |  |  | Series D Preferred |  |  | Montage Capital |  |  | Series C Preferred |  |  | Series D Preferred |
Volatility |  |  | 56.8 | % |  |  | 49.3 | % |  |  | 72.1 | % |  |  | 60.7 | % |  |  | 51.7 | % |  |  | 73.6 | %
Risk-free rate |  |  | 4.4 | % |  |  | 5.1 | % |  |  | 4.0 | % |  |  | 5.0 | % |  |  | 5.5 | % |  |  | 4.8 | %
Stock price |  | $ | 0.87 |  |  | $ | 0.87 |  |  | $ | 0.87 |  |  | $ | 0.83 |  |  | $ | 0.83 |  |  | $ | 0.83 |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] |
|  | As of December 31, 2023 |  |  |  |  |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrant liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Montage |  | $ | - |  |  | $ | - |  |  | $ | 12 |  |  | $ | 12 |
Series A and C |  |  | - |  |  |  | - |  |  |  | 11 |  |  |  | 11 |
Series D |  |  | - |  |  |  | - |  |  |  | 133 |  |  |  | 133 |
Total warrant liabilities |  | $ | - |  |  | $ | - |  |  | $ | 156 |  |  | $ | 156 |
|  | As of September 30, 2023 |  |  |  |  |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill, net |  | $ | - |  |  | $ | - |  |  | $ | 8,468 |  |  | $ | 8,468 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrant liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Montage |  |  | - |  |  |  | - |  |  |  | 12 |  |  |  | 12 |
Series A and C |  |  | - |  |  |  | - |  |  |  | 11 |  |  |  | 11 |
Series D |  |  | - |  |  |  | - |  |  |  | 151 |  |  |  | 151 |
Total warrant liabilities |  | $ | - |  |  | $ | - |  |  | $ | 174 |  |  | $ | 174 |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] |
|  | Warrant Liabilities |
Balance at beginning of period, October 1, 2023 |  | $ | 174 |
Additions |  |  | - |
Payments or exercises |  |  | - |
Adjustment to fair value |  |  | (18 | )
Balance at end of period, December 31, 2023 |  | $ | 156 |

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- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb) -SubTopic 10 -Topic 820 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -SubTopic 10 -Topic 820 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-3 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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