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Note 6 - Subsequent Events - 10Q (Details Textual) - USD ($) $ / shares in Units, $ in Millions |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 11, 2025 | Aug. 05, 2025 | Jul. 21, 2025 | Jul. 31, 2025 | Jun. 30, 2025 | Mar. 31, 2025 | Jul. 01, 2025 | Feb. 28, 2025 | Nov. 25, 2024 | Oct. 24, 2024 | Mar. 31, 2024 | Dec. 31, 2023 | Nov. 29, 2023
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  | $ 0.02 |
Class of Warrant or Right, Exercises in Period (in shares) |  |  |  |  | (0) | (0) |  |  |  |  |  |  |
Common Stock, Par or Stated Value Per Share (in dollars per share) |  |  |  |  | $ 0.001 | $ 0.001 |  | $ 0.001 |  | $ 0.001 | $ 0.001 |  | $ 0.001
Class of Warrant or Right, Outstanding (in shares) |  |  |  |  | 25,003 | 25,003 |  |  |  |  | 25,003 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares) |  |  |  |  | (0) | (0) |  |  |  |  |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Par or Stated Value Per Share (in dollars per share) |  |  | $ 0.001 |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares) | 177,652 |  |  | 57,331 |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Board of Directors Chairman [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares) | 8,773 |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Executive Chair of the Board [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares) | 65,542 |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Director [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares) | 3,750 |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Chief Executive Officer [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares) | 45,000 |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Chief Technology Officer [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares) | 8,773 |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Chief Medical Officer [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares) | 13,159 |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Chief Financial Officer [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares) | 32,655 |  |  |  |  |  |  |  |  |  |  |  |
Existing Warrants [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  |  | 1,477,596 |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exchanges, Percentage of Underlying Shares |  |  | 100.00% |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Warrants |  |  | $ 2.6 |  |  |  |  |  |  |  |  |  |
Payments for Warrant Issuance Fees |  |  | $ 0.3 |  |  |  |  |  |  |  |  |  |
Existing Warrants at 1.723 Exercise Price [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  | $ 1.723 |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercises in Period (in shares) |  |  | 855,000 |  |  |  |  |  |  |  |  |  |
Existing Warrants at 1.722 Exercise Price [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  |  | 622,596 |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  | $ 1.722 |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Term (Year) |  |  | 5 years 6 months |  |  |  |  |  |  |  |  |  |
Series B Warrants [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  |  | 1,477,596 |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  | $ 1.723 |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Term (Year) |  |  | 5 years 6 months |  |  |  |  |  |  |  |  |  |
Representative's Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Outstanding (in shares) |  |  |  |  | 91,985 |  |  |  |  |  |  |  |
Representative's Warrants [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  |  | 88,656 |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  | $ 2.6707 |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Term (Year) |  |  | 5 years |  |  |  |  |  |  |  |  |  |
Series A Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  |  |  |  |  |  |  | $ 6.54 |  |  |  |
Warrants and Rights Outstanding, Term (Year) |  |  |  |  |  |  |  |  | 5 years |  |  |  |
Class of Warrant or Right, Outstanding (in shares) |  |  |  |  | 1,533,096 |  |  |  |  |  |  |  |
Series A Warrants [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercises in Period (in shares) |  |  |  | 268,072 |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Outstanding (in shares) |  |  |  | 354,524 |  |  | 622,596 |  |  |  |  |  |
Pre-IPO Warrants [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercises in Period (in shares) |  | 54,400 |  |  |  |  |  |  |  |  |  |  |

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