Note 3 - Equity (Details Textual) | | | | 1 Months Ended | 3 Months Ended | | | | |
May 13, 2024 shares | Apr. 01, 2024 shares | Jan. 26, 2024 USD ($) $ / shares shares | Aug. 31, 2023 | Jun. 30, 2024 USD ($) $ / shares shares | Jun. 30, 2023 USD ($) shares | Mar. 31, 2024 USD ($) $ / shares shares | Feb. 15, 2024 USD ($) $ / shares shares | Nov. 29, 2023 $ / shares shares | Apr. 06, 2023 $ / shares shares |
Stock Issued During Period, Value, New Issues | $ | | | | | | | $ 2,840,000 | | | | |
Proceeds from Issuance of Common Stock | $ | | | | | | $ 0 | 2,840,000 | | | | |
Common Stock, Shares, Outstanding (in shares) | | | | | | 19,242,081 | | 18,846,094 | | | |
Common Stock, Shares Authorized (in shares) | | | | | | 500,000,000 | | 500,000,000 | | 500,000,000 | |
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares | | | | | | $ 0.001 | | $ 0.001 | | $ 0.001 | |
Preferred Stock, Shares Authorized (in shares) | | | | | | 10,000,000 | | 10,000,000 | | 10,000,000 | |
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares | | | | | | $ 0.001 | | $ 0.001 | | $ 0.001 | |
Common Stock, Shares, Issued (in shares) | | | | | | 19,242,081 | | 18,846,094 | | | |
Common Stock, Value, Issued | $ | | | | | | $ 19,000 | | $ 19,000 | | | |
Payments of Stock Issuance Costs | $ | | | | | | $ 0 | 105,000 | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Period Increase (Decrease) (in shares) | | | 942,305 | | | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares) | | | | | | 4,329,579 | | 2,003,600 | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) | | | | | | 2,325,979 | | | | | |
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share) | $ / shares | | | | | | $ 1.38 | | | | | |
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount | $ | | | | | | $ 5,400,000 | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number (in shares) | | | | | | 5,344,569 | | 5,744,569 | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number (in shares) | [1] | | | | | 321,317 | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Exercisable, Number Outstanding, Number (in shares) | | | | | | 5,341,236 | | | | | |
General and Administrative Expense [Member] | | | | | | | | | | | |
Share-Based Payment Arrangement, Expense | $ | | | | | | $ 300,000 | $ 0 | | | | |
Research and Development Expense [Member] | | | | | | | | | | | |
Share-Based Payment Arrangement, Expense | $ | | | | | | $ 100,000 | | | | | |
The 2023 Stock Plan [Member] | | | | | | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) | | | | | | | 4,000,000 | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Percentage of Outstanding Stock Maximum | | | | | 5% | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares) | | | | | | 0 | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) | | | | | | 2,325,979 | | | | | |
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share) | $ / shares | | | | | | $ 1.38 | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number (in shares) | | | | | | 0 | | | | | |
Restricted Stock [Member] | | | | | | | | | | | |
Shares Issued, Price Per Share (in dollars per share) | $ / shares | | | | | | | | | $ 3.8 | | |
Common Stock, Shares, Issued (in shares) | | | | | | | | | 35,000 | | |
Common Stock, Value, Issued | $ | | | | | | | | | $ 133,000 | | |
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount | $ | | | | | | $ 83,125 | | | | | |
Restricted Stock [Member] | General and Administrative Expense [Member] | | | | | | | | | | | |
Share-Based Payment Arrangement, Expense | $ | | | | | | $ 33,250 | $ 0 | | | | |
Share-Based Payment Arrangement, Option [Member] | Black-Scholes Model [Member] | | | | | | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value (in dollars per share) | $ / shares | | | | | | $ 2,600,000 | | | | | |
Share-Based Payment Arrangement, Option [Member] | The 2023 Stock Plan [Member] | | | | | | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) | | | | | | 4 years | | | | | |
Warrant [Member] | | | | | | | | | | | |
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount | $ | | | | | | $ 100,000 | | | | | |
Share-Based Payment Arrangement, Expense | $ | | | | | | $ 100,000 | $ 0 | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number (in shares) | | | | | | 5,257,929 | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Exercisable, Number Outstanding, Number (in shares) | | | | | | 5,257,929 | | | | | |
Convertible Debt with 4.99% Beneficial Ownership Limitation [Member] | | | | | | | | | | | |
Convertible Notes Payable | $ | | | | $ 1,300,000 | | | | | | | |
Debt Instrument, Convertible, Number of Equity Instruments | | | | 665,000 | | | | | | | |
Maximum [Member] | Share-Based Payment Arrangement, Option [Member] | Black-Scholes Model [Member] | | | | | | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Discount Rate | | | | | | 4.39% | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year) | | | | | | 6 years 3 months | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate | | | | | | 130% | | | | | |
Minimum [Member] | Share-Based Payment Arrangement, Option [Member] | Black-Scholes Model [Member] | | | | | | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Discount Rate | | | | | | 4.25% | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate | | | | | | 110% | | | | | |
Autonomix Medical, Inc [Member] | | | | | | | | | | | |
Subsidiary, Ownership Percentage, Noncontrolling Owner | | | | 4.99% | | | | | | | |
Autonomix Medical, Inc [Member] | Maximum [Member] | | | | | | | | | | | |
Subsidiary, Ownership Percentage, Noncontrolling Owner | | | | 4.99% | | | | | | | |
Conversion of Convertible Notes to Common Stock [Member] | | | | | | | | | | | |
Debt Conversion, Converted Instrument, Shares Issued (in shares) | | | | 335,000 | | 335,000 | | | | | |
IPO [Member] | | | | | | | | | | | |
Stock Issued During Period, Shares, New Issues (in shares) | | | | 2,234,222 | | | | | | | |
Shares Issued, Price Per Share (in dollars per share) | $ / shares | | | | $ 5 | | | | | | | |
Stock Issued During Period, Value, New Issues | $ | | | | $ 11.2 | | | | | | | |
Proceeds from Issuance of Common Stock | $ | | | | $ 9.8 | | | | | | | |
Common Stock, Shares, Outstanding (in shares) | | | | 18,687,061 | | | | | | | |
Stock Refunded During Period, Shares, IPO Common Stock (in shares) | | 1,050 | | | | | | | | | |
Private Placement [Member] | | | | | | | | | | | |
Stock Issued During Period, Shares, New Issues (in shares) | | | | | | 1,420,000 | | | | | |
Shares Issued, Price Per Share (in dollars per share) | $ / shares | | | | | | | | | | | $ 2 |
Stock Issued During Period, Value, New Issues | $ | | | | | | $ 2,840,000 | | | | | |
Common Stock, Shares Authorized (in shares) | | | | | | | | | | | 2,000,000 |
Payments of Stock Issuance Costs | $ | | | | | | $ 0 | | | | | |
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[1]Aggregate Intrinsic Value = Excess of market value over the exercise price of all in-the-money stock. No outstanding or exercisable options were in-the-money as of March 31, 2024. | |