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Note 6 - Fair Value of Financial Instruments (Tables) | 9 Months Ended
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Sep. 30, 2025
Notes Tables |
Fair Value, Liabilities Measured on Recurring Basis [Table Text Block] |
Level 3 |  | September 30, 2025 |  |  | December 31, 2024 |
Notes Warrants |  | $ | 78 |  |  | $ | 197 |
Additional Warrants |  |  | 9 |  |  |  | 27 |
Total |  | $ | 87 |  |  | $ | 224 |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] |
|  | Notes |  |  | Additional |  |  |  |  |
|  | Warrants |  |  | Warrants |  |  | Total |
Measurement at December 31, 2024 |  | $ | 197 |  |  | $ | 27 |  |  | $ | 224 |
Change in fair value |  | $ | (107 | ) |  | $ | (16 | ) |  | $ | (123 | )
Measurement at March 31, 2025 |  | $ | 90 |  |  | $ | 11 |  |  | $ | 101 |
Change in fair value |  | $ | 17 |  |  | $ | 3 |  |  | $ | 20 |
Measurement at June 30, 2025 |  | $ | 107 |  |  | $ | 14 |  |  | $ | 121 |
Change in fair value |  | $ | (29 | ) |  | $ | (5 | ) |  | $ | (34 | )
Measurement at September 30, 2025 |  | $ | 78 |  |  | $ | 9 |  |  | $ | 87 |
|  | Notes |  |  | Additional |  |  |  |  |
|  | Warrants |  |  | Warrants |  |  | Total |
Measurement at December 31, 2023 |  | $ | 334 |  |  | $ | 263 |  |  | $ | 597 |
Change in fair value |  | $ | 28 |  |  | $ | (214 | ) |  | $ | (186 | )
Measurement at March 31, 2024 |  | $ | 362 |  |  | $ | 49 |  |  | $ | 411 |
Change in fair value |  | $ | (24 | ) |  | $ | (18 | ) |  | $ | (42 | )
Measurement at June 30, 2024 |  | $ | 338 |  |  | $ | 31 |  |  | $ | 369 |
Change in fair value |  | $ | (203 | ) |  | $ | (17 | ) |  | $ | (220 | )
Measurement at September 30, 2024 |  | $ | 135 |  |  | $ | 14 |  |  | $ | 149 |

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- Definition Tabular disclosure of liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class 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). Where the quoted price in an active market for the identical liability is not available, the Level 1 input is the quoted price of an identical liability when traded as an asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -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 + Details
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- Definition Tabular disclosure of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset) using recurring unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + 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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