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Note 11 - Common Stock Warrants (Tables) | 9 Months Ended
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Sep. 30, 2024
Notes Tables |
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] |
|  | Warrants |  |  | Weighted- Average Exercise Price |
Outstanding at December 31, 2022 |  |  | 65,886 |  |  | $ | 269.54 |
Warrants granted |  |  | 145,056 |  |  | $ | 45.50 |
Warrants exercised |  |  | — |  |  | $ | — |
Warrants expired |  |  | — |  |  | $ | — |
Outstanding at September 30, 2023 |  |  | 210,942 |  |  | $ | 76.23 |
Outstanding at December 31, 2023 |  |  | 210,946 |  |  | $ | 50.96 |
Warrants granted |  |  | 10,730,589 |  |  | $ | 0.69 |
Pre-funded Warrants granted |  |  | 2,041,814 |  |  | $ | 0.01 |
Warrants exercised |  |  | (90,381 | ) |  | $ | 2.50 |
Pre-funded Warrants exercised |  |  | (2,041,814 | ) |  | $ | 0.01 |
Warrants expired |  |  | (14,879 | ) |  | $ | 88.87 |
Outstanding at September 30, 2024 |  |  | 10,836,275 |  |  | $ | 1.41 |
Schedule of Stockholders' Equity Note, Warrants or Rights Outstanding, Activity [Table Text Block] |
Series |  | Exercise Price* |  | Expiration Date |  | Warrants* |
July 2020 Warrants |  | $ | 2,021.25 |  | January 22, 2026 |  |  | 1,714 |
July 2020 Warrants |  | $ | 52.50 |  | January 22, 2026 |  |  | 2,206 |
TLF Warrants |  | $ | 822.96 |  | January 15, 2026 |  |  | 13 |
November 2021 Warrants |  | $ | 220.50 |  | September 11, 2028 |  |  | 7,654 |
November 2021 Warrants |  | $ | 52.50 |  | September 11, 2028 |  |  | 15,308 |
September 2022 Warrants |  | $ | 220.50 |  | September 11, 2028 |  |  | 2,552 |
September 2022 Warrants |  | $ | 52.50 |  | September 11, 2028 |  |  | 1,715 |
November 2022 A-1 Warrants |  | $ | 220.50 |  | November 20, 2028 |  |  | 2,268 |
December 2023 Warrants |  | $ | 8.75 |  | June 21, 2029 |  |  | 72,256 |
March 2024 Warrant |  | $ | 4.90 |  | March 24, 2029 |  |  | 28,572 |
June 2024 Warrants |  | $ | 2.57 |  | December 17, 2029 |  |  | 90,381 |
July 2024 F-1 Warrants |  | $ | 0.66 |  | July 30, 2029 |  |  | 3,537,212 |
July 2024 F-2 Warrants |  | $ | 0.66 |  | January 29, 2025 |  |  | 3,537,212 |
July 2024 F-3 Warrants |  | $ | 0.66 |  | July 29, 2025 |  |  | 3,537,212 |
Outstanding at September 30, 2024 |  |  |  |  |  |  |  | 10,836,275 |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] |
Warrant liabilities as of December 31, 2023 |  | $ | 334 |
Decrease in fair value of December 2023 Warrant liability during period |  |  | (122 | )
Fair value of March 2024 Warrant upon issuance |  |  | 92 |
Increase in fair value of March 2024 Warrant liability during period |  |  | 8 |
Reclassification of December 2023 Warrant liability to equity during period |  |  | (212 | )
Reclassification of March 2024 Warrant liability to equity during period |  |  | (100 | )
Warrant liabilities as of September 30, 2024 |  | $ | — |

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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://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + 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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