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Note 5 - Debt and Warrants Transactions (Details Textual) $ / shares in Units, $ in Thousands |  |  |  |  |  | 3 Months Ended | 9 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 02, 2025 USD ($) | Sep. 30, 2025 USD ($) $ / shares shares | Sep. 29, 2025 USD ($) $ / shares | Sep. 17, 2025 USD ($) | Sep. 11, 2025 USD ($) $ / shares shares | Sep. 30, 2025 USD ($) $ / shares shares | Sep. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) $ / shares shares | Sep. 30, 2024 USD ($) | Jul. 31, 2025 $ / shares shares | Dec. 31, 2024 $ / shares shares | May 02, 2024 $ / shares | Apr. 03, 2023 $ / shares shares | Aug. 12, 2022 $ / shares shares | Aug. 11, 2022 USD ($)
Proceeds from Issuance Notes and Warrants |  |  |  |  |  |  |  | $ 1,233 | $ 0 |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |  | $ 1.41 |  |  |  | $ 1.41 |  | $ 1.41 |  |  | $ 1.74 |  |  |  |
Class of Warrant or Right, Outstanding (in shares) | shares |  | 12,546,330 |  |  |  | 12,546,330 |  | 12,546,330 |  |  | 8,382,048 |  |  |  |
Warrant, Down Round Feature, Decrease in Net Income to Common Shareholder, Amount |  |  |  |  |  | $ 635 | $ (0) | $ 635 | $ (0) |  |  |  |  |  |
Warrants and Rights Outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,800
Measurement Input, Share Price [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 0.73 |  |  |  | 0.73 |  | 0.73 |  |  |  |  |  |  |
Measurement Input, Risk Free Interest Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 0.036 |  |  |  | 0.036 |  | 0.036 |  |  |  |  |  |  |
Measurement Input, Price Volatility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 0.9066 |  |  |  | 0.9066 |  | 0.9066 |  |  |  |  |  |  |
Measurement Input, Expected Term [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 4.85 |  |  |  | 4.85 |  | 4.85 |  |  |  |  |  |  |
September 11, 2025 Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Issuance Price (in dollars per share) | $ / shares |  |  |  |  | $ 0.125 |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercisable Commence Term (Month) |  |  |  |  | 6 months |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Term (Year) |  |  |  |  | 5 years 6 months |  |  |  |  |  |  |  |  |  |
September 29, 2025 Warrant [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercisable Commence Term (Month) |  |  | 6 months |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Term (Year) |  |  | 5 years 6 months |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |  |  | $ 0.73 |  |  |  |  |  |  |  |  |  |  |  |
September 2025 Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Outstanding (in shares) | shares |  | 1,512,934 |  |  |  | 1,512,934 |  | 1,512,934 |  |  |  |  |  |  |
Equity-classified Warrants [Member] | Measurement Input, Share Price [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 0.72 |  |  |  | 0.72 |  | 0.72 |  |  |  |  |  |  |
Equity-classified Warrants [Member] | Measurement Input, Share Price [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 0.73 |  |  |  | 0.73 |  | 0.73 |  |  |  |  |  |  |
Equity-classified Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 0.036 |  |  |  | 0.036 |  | 0.036 |  |  |  |  |  |  |
Equity-classified Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 0.037 |  |  |  | 0.037 |  | 0.037 |  |  |  |  |  |  |
Equity-classified Warrants [Member] | Measurement Input, Price Volatility [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 0.8867 |  |  |  | 0.8867 |  | 0.8867 |  |  |  |  |  |  |
Equity-classified Warrants [Member] | Measurement Input, Price Volatility [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 0.8981 |  |  |  | 0.8981 |  | 0.8981 |  |  |  |  |  |  |
Equity-classified Warrants [Member] | Measurement Input, Expected Term [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 5.5 |  |  |  | 5.5 |  | 5.5 |  |  |  |  |  |  |
July 2025 Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |  |  | $ 0.73 |  |  |  |  |  |  | $ 1.2 |  |  |  |  |
Class of Warrant or Right, Outstanding (in shares) | shares |  |  |  |  | 2,651,348 |  |  |  |  | 1,612,903 |  |  |  |  |
Notes Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  |  | $ 2.06 | $ 26.8 |  |
Class of Warrant or Right, Outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 279,851 |  |
Notes Warrants [Member] | Measurement Input, Share Price [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 0.72 |  |  |  | 0.72 |  | 0.72 |  |  | 1.31 |  |  |  |
Notes Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 0.036 |  |  |  | 0.036 |  | 0.036 |  |  | 0.042 |  |  |  |
Notes Warrants [Member] | Measurement Input, Price Volatility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 1.217 |  |  |  | 1.217 |  | 1.217 |  |  | 1.059 |  |  |  |
Notes Warrants [Member] | Measurement Input, Expected Term [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 1.86 |  |  |  | 1.86 |  | 1.86 |  |  | 2.61 |  |  |  |
Additional Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 21.2 |
Class of Warrant or Right, Outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  |  | 141,509 |
Additional Warrants [Member] | Measurement Input, Share Price [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 0.72 |  |  |  | 0.72 |  | 0.72 |  |  | 1.31 |  |  |  |
Additional Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 0.036 |  |  |  | 0.036 |  | 0.036 |  |  | 0.043 |  |  |  |
Additional Warrants [Member] | Measurement Input, Price Volatility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 1.157 |  |  |  | 1.157 |  | 1.157 |  |  | 0.996 |  |  |  |
Additional Warrants [Member] | Measurement Input, Expected Term [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 2.37 |  |  |  | 2.37 |  | 2.37 |  |  | 3.12 |  |  |  |
Smith [Member] | September 11, 2025 Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Warrants |  |  |  |  | $ 100 |  |  |  |  |  |  |  |  |  |
Huffmyer [Member] | September 11, 2025 Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Warrants |  |  |  | $ 15 |  |  |  |  |  |  |  |  |  |  |
The September 11, 2025 Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 15.00% |  |  |  |  |  |  |  |  |  |
The September 11, 2025 Notes [Member] | Smith [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Maximum Borrowing Capacity |  |  |  |  | $ 700 |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  |  | 700 |  |  |  |  |  |  |  |  |  |
The September 11, 2025 Notes [Member] | Smith [Member] | September 11, 2025 Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance Notes and Warrants |  |  |  |  | 800 |  |  |  |  |  |  |  |  |  |
The September 11, 2025 Notes [Member] | Huffmyer [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Maximum Borrowing Capacity |  |  |  |  | $ 100 |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  | 85 |  |  |  |  |  |  |  |  |  |  |
The September 11, 2025 Notes [Member] | Huffmyer [Member] | September 11, 2025 Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance Notes and Warrants |  |  |  | $ 100 |  |  |  |  |  |  |  |  |  |  |
September 29, 2025 Note [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Maximum Borrowing Capacity |  |  | $ 400 |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  | $ 300 |  |  |  |  |  |  |  |  |  |  |  |  |
September 29, 2025 Note [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Debt | $ 100 |  |  |  |  |  |  |  |  |  |  |  |  |  |
September 11th and 29th 2025 Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance Notes and Warrants |  |  |  |  |  | $ 1,200 |  | $ 1,200 |  |  |  |  |  |  |
Debt Instrument, Unamortized Discount |  | $ 400 |  |  |  | $ 400 |  | $ 400 |  |  |  |  |  |  |

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