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v3.25.1

Note 3 - Fair Value Measurements - Fair Value Valuation Assumptions (Details) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2025 USD ($) | Mar. 31, 2024 USD ($)
Non-cash gain on changes in fair value of warrant liability |  | $ (0) | $ (194)
Issuance, March 25, 2024 [Member] | March 2024 Warrant [Member] |  |  |
Total Value |  | $ 100 |
Issuance, March 25, 2024 [Member] | March 2024 Warrant [Member] | Measurement Input, Exercise Price [Member] |  |  |
Measurement Input |  | 4.9 |
Issuance, March 25, 2024 [Member] | March 2024 Warrant [Member] | Measurement Input, Share Price [Member] |  |  |
Measurement Input |  | 4.55 |
Issuance, March 25, 2024 [Member] | March 2024 Warrant [Member] | Measurement Input, Price Volatility [Member] |  |  |
Measurement Input |  | 0.869 |
Issuance, March 25, 2024 [Member] | March 2024 Warrant [Member] | Measurement Input, Risk Free Interest Rate [Member] |  |  |
Measurement Input |  | 0.0424 |
Issuance, March 25, 2024 [Member] | March 2024 Warrant [Member] | Measurement Input, Expected Dividend Rate [Member] |  |  |
Measurement Input |  | 0 |
Issuance, March 25, 2024 [Member] | March 2024 Warrant [Member] | Measurement Input, Expected Term [Member] |  |  |
Measurement Input |  | 5.5 |
Issuance, March 25, 2024 [Member] | Unsecured Convertible Notes [Member] |  |  |
Total value, embedded |  | $ 200 |
Issuance, March 25, 2024 [Member] | Unsecured Convertible Notes [Member] | Measurement Input, Exercise Price [Member] |  |  |
Measurement input, embedded derivative |  | 4.9 |
Issuance, March 25, 2024 [Member] | Unsecured Convertible Notes [Member] | Measurement Input, Share Price [Member] |  |  |
Measurement input, embedded derivative |  | 4.51 |
Issuance, March 25, 2024 [Member] | Unsecured Convertible Notes [Member] | Measurement Input, Option Volatility [Member] |  |  |
Measurement input, embedded derivative |  | 0.869 |
Issuance, March 25, 2024 [Member] | Unsecured Convertible Notes [Member] | Measurement Input, Risk Free Interest Rate [Member] |  |  |
Measurement input, embedded derivative |  | 0.0454 |
Issuance, March 25, 2024 [Member] | Unsecured Convertible Notes [Member] | Measurement Input, Expected Dividend Rate [Member] |  |  |
Measurement input, embedded derivative |  | 0 |
Issuance, March 25, 2024 [Member] | Unsecured Convertible Notes [Member] | Measurement Input, Expected Term [Member] |  |  |
Measurement input, embedded derivative |  | 2 |
Reporting Date, March 31, 2024 [Member] | March 2024 Warrant [Member] |  |  |
Total Value |  | $ 100 |
Non-cash gain on changes in fair value of warrant liability |  | $ 21 |
Reporting Date, March 31, 2024 [Member] | March 2024 Warrant [Member] | Measurement Input, Exercise Price [Member] |  |  |
Measurement Input |  | 4.9 |
Reporting Date, March 31, 2024 [Member] | March 2024 Warrant [Member] | Measurement Input, Share Price [Member] |  |  |
Measurement Input |  | 3.5 |
Reporting Date, March 31, 2024 [Member] | March 2024 Warrant [Member] | Measurement Input, Price Volatility [Member] |  |  |
Measurement Input |  | 0.869 |
Reporting Date, March 31, 2024 [Member] | March 2024 Warrant [Member] | Measurement Input, Risk Free Interest Rate [Member] |  |  |
Measurement Input |  | 0.0421 |
Reporting Date, March 31, 2024 [Member] | March 2024 Warrant [Member] | Measurement Input, Expected Dividend Rate [Member] |  |  |
Measurement Input |  | 0 |
Reporting Date, March 31, 2024 [Member] | March 2024 Warrant [Member] | Measurement Input, Expected Term [Member] |  |  |
Measurement Input |  | 5.5 |
Reporting Date, March 31, 2024 [Member] | Unsecured Convertible Notes [Member] |  |  |
Total value, embedded |  | $ 200 |
Gain, embedded derivative |  | $ (65) |
Reporting Date, March 31, 2024 [Member] | Unsecured Convertible Notes [Member] | Measurement Input, Exercise Price [Member] |  |  |
Measurement input, embedded derivative |  | 4.9 |
Reporting Date, March 31, 2024 [Member] | Unsecured Convertible Notes [Member] | Measurement Input, Share Price [Member] |  |  |
Measurement input, embedded derivative |  | 3.5 |
Reporting Date, March 31, 2024 [Member] | Unsecured Convertible Notes [Member] | Measurement Input, Option Volatility [Member] |  |  |
Measurement input, embedded derivative |  | 0.869 |
Reporting Date, March 31, 2024 [Member] | Unsecured Convertible Notes [Member] | Measurement Input, Risk Free Interest Rate [Member] |  |  |
Measurement input, embedded derivative |  | 0.0459 |
Reporting Date, March 31, 2024 [Member] | Unsecured Convertible Notes [Member] | Measurement Input, Expected Dividend Rate [Member] |  |  |
Measurement input, embedded derivative |  | 0 |
Reporting Date, March 31, 2024 [Member] | Unsecured Convertible Notes [Member] | Measurement Input, Expected Term [Member] |  |  |
Measurement input, embedded derivative |  | 2 |
Issuance, May 1, 2023 [Member] | May 2023 Warrants [Member] |  |  |
Total Value |  | $ 300 |
Issuance, May 1, 2023 [Member] | May 2023 Warrants [Member] | Measurement Input, Exercise Price [Member] |  |  |
Measurement Input |  | 8.75 |
Issuance, May 1, 2023 [Member] | May 2023 Warrants [Member] | Measurement Input, Share Price [Member] |  |  |
Measurement Input |  | 7.14 |
Issuance, May 1, 2023 [Member] | May 2023 Warrants [Member] | Measurement Input, Price Volatility [Member] |  |  |
Measurement Input |  | 0.793 |
Issuance, May 1, 2023 [Member] | May 2023 Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member] | Minimum [Member] |  |  |
Measurement Input |  | 0.0385 |
Issuance, May 1, 2023 [Member] | May 2023 Warrants [Member] | Measurement Input, Expected Dividend Rate [Member] |  |  |
Measurement Input |  | 0 |
Issuance, May 1, 2023 [Member] | May 2023 Warrants [Member] | Measurement Input, Expected Term [Member] | Minimum [Member] |  |  |
Measurement Input |  | 5.5 |
Stockholder Approval, June 9, 2023 [Member] | May 2023 Warrants [Member] |  |  |
Total Value |  | $ 200 |
Stockholder Approval, June 9, 2023 [Member] | May 2023 Warrants [Member] | Measurement Input, Exercise Price [Member] |  |  |
Measurement Input |  | 8.75 |
Stockholder Approval, June 9, 2023 [Member] | May 2023 Warrants [Member] | Measurement Input, Share Price [Member] |  |  |
Measurement Input |  | 3.5 |
Stockholder Approval, June 9, 2023 [Member] | May 2023 Warrants [Member] | Measurement Input, Price Volatility [Member] |  |  |
Measurement Input |  | 0.923 |
Stockholder Approval, June 9, 2023 [Member] | May 2023 Warrants [Member] | Measurement Input, Expected Dividend Rate [Member] |  |  |
Measurement Input |  | 0 |
Series C Preferred Stock [Member] | Prior to Ratchet, March 24, 2024 [Member] |  |  |
Total Value | [1] | $ 500 |
Series C Preferred Stock [Member] | Prior to Ratchet, March 24, 2024 [Member] | Measurement Input, Exercise Price [Member] |  |  |
Measurement Input |  | 8.75 |
Series C Preferred Stock [Member] | Prior to Ratchet, March 24, 2024 [Member] | Measurement Input, Option Volatility [Member] |  |  |
Measurement Input |  | 0.799 |
Series C Preferred Stock [Member] | Prior to Ratchet, March 24, 2024 [Member] | Measurement Input, Risk Free Interest Rate [Member] |  |  |
Measurement Input |  | 0.0551 |
Series C Preferred Stock [Member] | Prior to Ratchet, March 24, 2024 [Member] | Measurement Input, Expected Dividend Rate [Member] |  |  |
Measurement Input |  | 0 |
Series C Preferred Stock [Member] | Prior to Ratchet, March 24, 2024 [Member] | Measurement Input, Expected Term [Member] |  |  |
Measurement Input |  | 0.1 |
Series C Preferred Stock [Member] | After Ratchet, March 24, 2024 [Member] |  |  |
Total Value | [1] | $ 900 |
Deemed dividend |  | $ 380 |
Series C Preferred Stock [Member] | After Ratchet, March 24, 2024 [Member] | Measurement Input, Exercise Price [Member] |  |  |
Measurement Input |  | 4.9 |
Series C Preferred Stock [Member] | After Ratchet, March 24, 2024 [Member] | Measurement Input, Option Volatility [Member] |  |  |
Measurement Input |  | 0.799 |
Series C Preferred Stock [Member] | After Ratchet, March 24, 2024 [Member] | Measurement Input, Risk Free Interest Rate [Member] |  |  |
Measurement Input |  | 0.0551 |
Series C Preferred Stock [Member] | After Ratchet, March 24, 2024 [Member] | Measurement Input, Expected Dividend Rate [Member] |  |  |
Measurement Input |  | 0 |
Series C Preferred Stock [Member] | After Ratchet, March 24, 2024 [Member] | Measurement Input, Expected Term [Member] |  |  |
Measurement Input |  | 0.1 |
[1] | Includes value of incremental shares underlying preferred stock and adjusted for probability of occurrence.

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