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Note 9 - Convertible Notes (Details Textual) |  |  |  |  |  | 3 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Jul. 26, 2024 USD ($) | May 30, 2024 $ / shares | Mar. 24, 2024 USD ($) | Mar. 01, 2024 USD ($) | Apr. 27, 2023 USD ($) | Mar. 31, 2025 USD ($) | Mar. 31, 2024 USD ($) | May 01, 2023 USD ($)
Amortization of Debt Issuance Costs and Discounts |  |  |  |  |  | $ (0) | $ 433,000 |
Repayments of Convertible Debt |  |  |  |  |  | $ (0) | 578,000 |
Unsecured Convertible Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  | $ 525,000 |  |  |  |  |
Embedded Derivative, Fair Value of Embedded Derivative Liability |  |  | 224,000 |  |  |  |  |
Embedded Derivative, Fair Value |  |  | 159,000 |  |  |  |  |
Unrealized Gain (Loss) on Derivatives |  |  | $ 65,000 |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  |  |  | 144.00% |  |
Amortization of Debt Issuance Costs and Discounts |  |  |  |  |  | $ 39 | 1 |
Unsecured Convertible Notes [Member] | Conversion of Unsecured Convertible Notes To Common Stock [Member] |  |  |  |  |  |  |  |
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares |  | $ 4.9 |  |  |  |  |  |
Debt Instrument, Convertible, Number of Equity Instruments |  | 107,146 |  |  |  |  |  |
Original Issue Discount Senior Secured Convertible Debentures [Member] |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  |  | $ 3,300,000
Debt Instrument, Interest Rate, Effective Percentage |  |  |  |  |  | 173.00% |  |
Amortization of Debt Issuance Costs and Discounts |  |  |  |  |  |  | $ 400,000 |
Debt Instrument, Unamortized Discount |  |  |  |  |  |  |  | $ 300,000
Debt Instrument, Increase (Decrease), Net |  |  |  |  | $ 183,000 |  |  |
Debt Instrument, Redemption Price, Percentage |  |  |  |  | 20.00% |  |  |
Repayments of Convertible Debt | $ 433,000 |  |  | $ 45,000 |  |  |  |

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