v3.26.1
Note 3 - Fair Value Measurements - Fair Value Valuation Assumptions (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Non-cash loss (gain) on changes in fair value of warrant liability   $ 24,486 $ (114)
Prior to Ratchet, March 24, 2024 [Member] | Series C Preferred Stock [Member]      
Liabilities, Fair Value Disclosure [1] $ 500 $ 500  
Prior to Ratchet, March 24, 2024 [Member] | Series C Preferred Stock [Member] | Measurement Input, Exercise Price [Member]      
Measurement Input 43.75 43.75  
Prior to Ratchet, March 24, 2024 [Member] | Series C Preferred Stock [Member] | Measurement Input, Share Price [Member]      
Measurement Input 23.85 23.85  
Prior to Ratchet, March 24, 2024 [Member] | Series C Preferred Stock [Member] | Measurement Input, Option Volatility [Member]      
Measurement Input 0.799 0.799  
Prior to Ratchet, March 24, 2024 [Member] | Series C Preferred Stock [Member] | Measurement Input, Risk Free Interest Rate [Member]      
Measurement Input 0.0551 0.0551  
Prior to Ratchet, March 24, 2024 [Member] | Series C Preferred Stock [Member] | Measurement Input, Expected Dividend Rate [Member]      
Measurement Input 0 0  
Prior to Ratchet, March 24, 2024 [Member] | Series C Preferred Stock [Member] | Measurement Input, Expected Term [Member]      
Measurement Input 0.1 0.1  
Issuance, March 25, 2024 [Member] | Unsecured Convertible Notes [Member]      
Total value, embedded $ 200 $ 200  
Issuance, March 25, 2024 [Member] | Unsecured Convertible Notes [Member] | Measurement Input, Exercise Price [Member]      
Measurement input, embedded derivative 24.5 24.5  
Issuance, March 25, 2024 [Member] | Unsecured Convertible Notes [Member] | Measurement Input, Share Price [Member]      
Measurement input, embedded derivative 22.55 22.55  
Issuance, March 25, 2024 [Member] | Unsecured Convertible Notes [Member] | Measurement Input, Price Volatility [Member]      
Measurement input, embedded derivative 0.869 0.869  
Issuance, March 25, 2024 [Member] | Unsecured Convertible Notes [Member] | Measurement Input, Risk Free Interest Rate [Member]      
Measurement input, embedded derivative 0.0454 0.0454  
Issuance, March 25, 2024 [Member] | Unsecured Convertible Notes [Member] | Measurement Input, Expected Dividend Rate [Member]      
Measurement input, embedded derivative 0 0  
Issuance, March 25, 2024 [Member] | Unsecured Convertible Notes [Member] | Measurement Input, Expected Term [Member]      
Measurement input, embedded derivative 2 2  
Stockholder Approval May 28 2024 [Member] | Unsecured Convertible Notes [Member]      
Total value, embedded $ 200 $ 200  
Gain, embedded derivative   $ 82  
Stockholder Approval May 28 2024 [Member] | Unsecured Convertible Notes [Member] | Measurement Input, Exercise Price [Member]      
Measurement input, embedded derivative 24.5 24.5  
Stockholder Approval May 28 2024 [Member] | Unsecured Convertible Notes [Member] | Measurement Input, Share Price [Member]      
Measurement input, embedded derivative 24.7 24.7  
Stockholder Approval May 28 2024 [Member] | Unsecured Convertible Notes [Member] | Measurement Input, Price Volatility [Member]      
Measurement input, embedded derivative 0.839 0.839  
Stockholder Approval May 28 2024 [Member] | Unsecured Convertible Notes [Member] | Measurement Input, Risk Free Interest Rate [Member]      
Measurement input, embedded derivative 0.0494 0.0494  
Stockholder Approval May 28 2024 [Member] | Unsecured Convertible Notes [Member] | Measurement Input, Expected Dividend Rate [Member]      
Measurement input, embedded derivative 0 0  
Stockholder Approval May 28 2024 [Member] | Unsecured Convertible Notes [Member] | Measurement Input, Expected Term [Member]      
Measurement input, embedded derivative 1.8 1.8  
After Ratchet, March 24, 2024 [Member] | Series C Preferred Stock [Member]      
Liabilities, Fair Value Disclosure [1] $ 900 $ 900  
Deemed dividend   $ 400  
After Ratchet, March 24, 2024 [Member] | Series C Preferred Stock [Member] | Measurement Input, Exercise Price [Member]      
Measurement Input 24.5 24.5  
After Ratchet, March 24, 2024 [Member] | Series C Preferred Stock [Member] | Measurement Input, Share Price [Member]      
Measurement Input 23.85 23.85  
After Ratchet, March 24, 2024 [Member] | Series C Preferred Stock [Member] | Measurement Input, Option Volatility [Member]      
Measurement Input 0.799 0.799  
After Ratchet, March 24, 2024 [Member] | Series C Preferred Stock [Member] | Measurement Input, Risk Free Interest Rate [Member]      
Measurement Input 0.0551 0.0551  
After Ratchet, March 24, 2024 [Member] | Series C Preferred Stock [Member] | Measurement Input, Expected Dividend Rate [Member]      
Measurement Input 0 0  
After Ratchet, March 24, 2024 [Member] | Series C Preferred Stock [Member] | Measurement Input, Expected Term [Member]      
Measurement Input 0.1 0.1  
March 2024 Warrant [Member] | Reporting Date, March 31, 2024 [Member]      
Liabilities, Fair Value Disclosure $ 100 $ 100  
Non-cash loss (gain) on changes in fair value of warrant liability   $ 21  
March 2024 Warrant [Member] | Reporting Date, March 31, 2024 [Member] | Measurement Input, Exercise Price [Member]      
Measurement Input 24.5 24.5  
March 2024 Warrant [Member] | Reporting Date, March 31, 2024 [Member] | Measurement Input, Share Price [Member]      
Measurement Input 18.3 18.3  
March 2024 Warrant [Member] | Reporting Date, March 31, 2024 [Member] | Measurement Input, Price Volatility [Member]      
Measurement Input 0.869 0.869  
March 2024 Warrant [Member] | Reporting Date, March 31, 2024 [Member] | Measurement Input, Risk Free Interest Rate [Member]      
Measurement Input 0.0421 0.0421  
March 2024 Warrant [Member] | Reporting Date, March 31, 2024 [Member] | Measurement Input, Expected Dividend Rate [Member]      
Measurement Input 0 0  
March 2024 Warrant [Member] | Reporting Date, March 31, 2024 [Member] | Measurement Input, Expected Term [Member]      
Measurement Input 5.5 5.5  
March 2024 Warrant [Member] | Stockholder Approval May 28 2024 [Member]      
Liabilities, Fair Value Disclosure $ 100 $ 100  
Non-cash loss (gain) on changes in fair value of warrant liability   $ 28  
March 2024 Warrant [Member] | Stockholder Approval May 28 2024 [Member] | Measurement Input, Exercise Price [Member]      
Measurement Input 24.5 24.5  
March 2024 Warrant [Member] | Stockholder Approval May 28 2024 [Member] | Measurement Input, Share Price [Member]      
Measurement Input 24.7 24.7  
March 2024 Warrant [Member] | Stockholder Approval May 28 2024 [Member] | Measurement Input, Price Volatility [Member]      
Measurement Input 0.839 0.839  
March 2024 Warrant [Member] | Stockholder Approval May 28 2024 [Member] | Measurement Input, Risk Free Interest Rate [Member]      
Measurement Input 0.0456 0.0456  
March 2024 Warrant [Member] | Stockholder Approval May 28 2024 [Member] | Measurement Input, Expected Dividend Rate [Member]      
Measurement Input 0 0  
March 2024 Warrant [Member] | Stockholder Approval May 28 2024 [Member] | Measurement Input, Expected Term [Member]      
Measurement Input 5.3 5.3  
September 2022, November 2022, and May 2023 Warrants [Member] | Pre-amendment June 14, 2024 [Member]      
Liabilities, Fair Value Disclosure $ 66 $ 66  
September 2022, November 2022, and May 2023 Warrants [Member] | Pre-amendment June 14, 2024 [Member] | Measurement Input, Exercise Price [Member] | Minimum [Member]      
Measurement Input 43.75 43.75  
September 2022, November 2022, and May 2023 Warrants [Member] | Pre-amendment June 14, 2024 [Member] | Measurement Input, Exercise Price [Member] | Maximum [Member]      
Measurement Input 262.5 262.5  
September 2022, November 2022, and May 2023 Warrants [Member] | Pre-amendment June 14, 2024 [Member] | Measurement Input, Share Price [Member]      
Measurement Input 12.55 12.55  
September 2022, November 2022, and May 2023 Warrants [Member] | Pre-amendment June 14, 2024 [Member] | Measurement Input, Price Volatility [Member]      
Measurement Input 0.893 0.893  
September 2022, November 2022, and May 2023 Warrants [Member] | Pre-amendment June 14, 2024 [Member] | Measurement Input, Risk Free Interest Rate [Member] | Minimum [Member]      
Measurement Input 0.0427 0.0427  
September 2022, November 2022, and May 2023 Warrants [Member] | Pre-amendment June 14, 2024 [Member] | Measurement Input, Risk Free Interest Rate [Member] | Maximum [Member]      
Measurement Input 0.0508 0.0508  
September 2022, November 2022, and May 2023 Warrants [Member] | Pre-amendment June 14, 2024 [Member] | Measurement Input, Expected Dividend Rate [Member]      
Measurement Input 0 0  
September 2022, November 2022, and May 2023 Warrants [Member] | Pre-amendment June 14, 2024 [Member] | Measurement Input, Expected Term [Member] | Minimum [Member]      
Measurement Input 1 1  
September 2022, November 2022, and May 2023 Warrants [Member] | Pre-amendment June 14, 2024 [Member] | Measurement Input, Expected Term [Member] | Maximum [Member]      
Measurement Input 4.4 4.4  
September 2022, November 2022, and May 2023 Warrants [Member] | Post amendment June 14, 2024 [Member]      
Liabilities, Fair Value Disclosure $ 100 $ 100  
Non-cash loss (gain) on changes in fair value of warrant liability   $ 70  
September 2022, November 2022, and May 2023 Warrants [Member] | Post amendment June 14, 2024 [Member] | Measurement Input, Exercise Price [Member]      
Measurement Input 12.5 12.5  
September 2022, November 2022, and May 2023 Warrants [Member] | Post amendment June 14, 2024 [Member] | Measurement Input, Share Price [Member]      
Measurement Input 12.55 12.55  
September 2022, November 2022, and May 2023 Warrants [Member] | Post amendment June 14, 2024 [Member] | Measurement Input, Price Volatility [Member]      
Measurement Input 0.893 0.893  
September 2022, November 2022, and May 2023 Warrants [Member] | Post amendment June 14, 2024 [Member] | Measurement Input, Risk Free Interest Rate [Member] | Minimum [Member]      
Measurement Input 0.0427 0.0427  
September 2022, November 2022, and May 2023 Warrants [Member] | Post amendment June 14, 2024 [Member] | Measurement Input, Risk Free Interest Rate [Member] | Maximum [Member]      
Measurement Input 0.0508 0.0508  
September 2022, November 2022, and May 2023 Warrants [Member] | Post amendment June 14, 2024 [Member] | Measurement Input, Expected Dividend Rate [Member]      
Measurement Input 0 0  
September 2022, November 2022, and May 2023 Warrants [Member] | Post amendment June 14, 2024 [Member] | Measurement Input, Expected Term [Member] | Minimum [Member]      
Measurement Input 1 1  
September 2022, November 2022, and May 2023 Warrants [Member] | Post amendment June 14, 2024 [Member] | Measurement Input, Expected Term [Member] | Maximum [Member]      
Measurement Input 4.4 4.4  
Series F-1 Warrants [Member] | Prior to Adjustment [Member]      
Liabilities, Fair Value Disclosure $ 1,700 $ 1,700  
Series F-1 Warrants [Member] | Prior to Adjustment [Member] | Measurement Input, Exercise Price [Member]      
Measurement Input 5.5 5.5  
Series F-1 Warrants [Member] | Prior to Adjustment [Member] | Measurement Input, Share Price [Member]      
Measurement Input 3.55 3.55  
Series F-1 Warrants [Member] | Prior to Adjustment [Member] | Measurement Input, Price Volatility [Member]      
Measurement Input 0.971 0.971  
Series F-1 Warrants [Member] | Prior to Adjustment [Member] | Measurement Input, Risk Free Interest Rate [Member]      
Measurement Input 0.0355 0.0355  
Series F-1 Warrants [Member] | Prior to Adjustment [Member] | Measurement Input, Expected Dividend Rate [Member]      
Measurement Input 0 0  
Series F-1 Warrants [Member] | Prior to Adjustment [Member] | Measurement Input, Expected Term [Member]      
Measurement Input 4.84 4.84  
Series F-1 Warrants [Member] | After Adjustment [Member]      
Liabilities, Fair Value Disclosure $ 1,900 $ 1,900  
Deemed dividend   $ 200  
Series F-1 Warrants [Member] | After Adjustment [Member] | Measurement Input, Exercise Price [Member]      
Measurement Input 3.3 3.3  
Series F-1 Warrants [Member] | After Adjustment [Member] | Measurement Input, Share Price [Member]      
Measurement Input 3.55 3.55  
Series F-1 Warrants [Member] | After Adjustment [Member] | Measurement Input, Price Volatility [Member]      
Measurement Input 0.971 0.971  
Series F-1 Warrants [Member] | After Adjustment [Member] | Measurement Input, Risk Free Interest Rate [Member]      
Measurement Input 0.0355 0.0355  
Series F-1 Warrants [Member] | After Adjustment [Member] | Measurement Input, Expected Dividend Rate [Member]      
Measurement Input 0 0  
Series F-1 Warrants [Member] | After Adjustment [Member] | Measurement Input, Expected Term [Member]      
Measurement Input 4.84 4.84  
Series F-2 Warrants [Member] | Prior to Adjustment [Member]      
Liabilities, Fair Value Disclosure $ 200 $ 200  
Series F-2 Warrants [Member] | Prior to Adjustment [Member] | Measurement Input, Exercise Price [Member]      
Measurement Input 5.5 5.5  
Series F-2 Warrants [Member] | Prior to Adjustment [Member] | Measurement Input, Share Price [Member]      
Measurement Input 3.55 3.55  
Series F-2 Warrants [Member] | Prior to Adjustment [Member] | Measurement Input, Price Volatility [Member]      
Measurement Input 0.971 0.971  
Series F-2 Warrants [Member] | Prior to Adjustment [Member] | Measurement Input, Risk Free Interest Rate [Member]      
Measurement Input 0.0464 0.0464  
Series F-2 Warrants [Member] | Prior to Adjustment [Member] | Measurement Input, Expected Dividend Rate [Member]      
Measurement Input 0 0  
Series F-2 Warrants [Member] | Prior to Adjustment [Member] | Measurement Input, Expected Term [Member]      
Measurement Input 0.34 0.34  
Series F-2 Warrants [Member] | After Adjustment [Member]      
Liabilities, Fair Value Disclosure $ 600 $ 600  
Deemed dividend   $ 400  
Series F-2 Warrants [Member] | After Adjustment [Member] | Measurement Input, Exercise Price [Member]      
Measurement Input 3.3 3.3  
Series F-2 Warrants [Member] | After Adjustment [Member] | Measurement Input, Share Price [Member]      
Measurement Input 3.55 3.55  
Series F-2 Warrants [Member] | After Adjustment [Member] | Measurement Input, Price Volatility [Member]      
Measurement Input 0.971 0.971  
Series F-2 Warrants [Member] | After Adjustment [Member] | Measurement Input, Risk Free Interest Rate [Member]      
Measurement Input 0.0464 0.0464  
Series F-2 Warrants [Member] | After Adjustment [Member] | Measurement Input, Expected Dividend Rate [Member]      
Measurement Input 0 0  
Series F-2 Warrants [Member] | After Adjustment [Member] | Measurement Input, Expected Term [Member]      
Measurement Input 0.34 0.34  
Series F-3 Warrants [Member] | Prior to Adjustment [Member]      
Liabilities, Fair Value Disclosure $ 600 $ 600  
Series F-3 Warrants [Member] | Prior to Adjustment [Member] | Measurement Input, Exercise Price [Member]      
Measurement Input 5.5 5.5  
Series F-3 Warrants [Member] | Prior to Adjustment [Member] | Measurement Input, Share Price [Member]      
Measurement Input 3.55 3.55  
Series F-3 Warrants [Member] | Prior to Adjustment [Member] | Measurement Input, Price Volatility [Member]      
Measurement Input 0.971 0.971  
Series F-3 Warrants [Member] | Prior to Adjustment [Member] | Measurement Input, Risk Free Interest Rate [Member]      
Measurement Input 0.041 0.041  
Series F-3 Warrants [Member] | Prior to Adjustment [Member] | Measurement Input, Expected Dividend Rate [Member]      
Measurement Input 0 0  
Series F-3 Warrants [Member] | Prior to Adjustment [Member] | Measurement Input, Expected Term [Member]      
Measurement Input 0.84 0.84  
Series F-3 Warrants [Member] | After Adjustment [Member]      
Liabilities, Fair Value Disclosure $ 1,000 $ 1,000  
Deemed dividend   $ 400  
Series F-3 Warrants [Member] | After Adjustment [Member] | Measurement Input, Exercise Price [Member]      
Measurement Input 3.3 3.3  
Series F-3 Warrants [Member] | After Adjustment [Member] | Measurement Input, Share Price [Member]      
Measurement Input 3.55 3.55  
Series F-3 Warrants [Member] | After Adjustment [Member] | Measurement Input, Price Volatility [Member]      
Measurement Input 0.971 0.971  
Series F-3 Warrants [Member] | After Adjustment [Member] | Measurement Input, Risk Free Interest Rate [Member]      
Measurement Input 0.041 0.041  
Series F-3 Warrants [Member] | After Adjustment [Member] | Measurement Input, Expected Dividend Rate [Member]      
Measurement Input 0 0  
Series F-3 Warrants [Member] | After Adjustment [Member] | Measurement Input, Expected Term [Member]      
Measurement Input 0.84 0.84  
The December 2023 Warrants [Member] | Stockholder Approval May 28 2024 [Member]      
Liabilities, Fair Value Disclosure $ 200 $ 200  
Non-cash loss (gain) on changes in fair value of warrant liability $ (51)    
The December 2023 Warrants [Member] | Stockholder Approval May 28 2024 [Member] | Measurement Input, Exercise Price [Member]      
Measurement Input 43.75 43.75  
The December 2023 Warrants [Member] | Stockholder Approval May 28 2024 [Member] | Measurement Input, Share Price [Member]      
Measurement Input 24.7 24.7  
The December 2023 Warrants [Member] | Stockholder Approval May 28 2024 [Member] | Measurement Input, Price Volatility [Member]      
Measurement Input 0.839 0.839  
The December 2023 Warrants [Member] | Stockholder Approval May 28 2024 [Member] | Measurement Input, Risk Free Interest Rate [Member]      
Measurement Input 0.0456 0.0456  
The December 2023 Warrants [Member] | Stockholder Approval May 28 2024 [Member] | Measurement Input, Expected Dividend Rate [Member]      
Measurement Input 0 0  
The December 2023 Warrants [Member] | Stockholder Approval May 28 2024 [Member] | Measurement Input, Expected Term [Member]      
Measurement Input 5.1 5.1  
[1] Includes value of incremental shares underlying preferred stock and adjusted for probability of occurrence.