Note 4 - Equity (Details Textual)
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1 Months Ended |
3 Months Ended |
9 Months Ended |
12 Months Ended |
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|
Apr. 01, 2025
shares
|
Nov. 25, 2024
USD ($)
$ / shares
shares
|
Nov. 22, 2024
shares
|
Jul. 10, 2024
USD ($)
shares
|
Apr. 01, 2024
shares
|
Feb. 15, 2024
USD ($)
$ / shares
shares
|
Mar. 31, 2025
USD ($)
$ / shares
shares
|
Aug. 31, 2023 |
Mar. 31, 2025
USD ($)
$ / shares
shares
|
Dec. 31, 2024
USD ($)
$ / shares
|
Mar. 31, 2024
USD ($)
$ / shares
shares
|
Dec. 31, 2024
USD ($)
$ / shares
|
Mar. 31, 2025
USD ($)
$ / shares
shares
|
Mar. 31, 2024
USD ($)
$ / shares
shares
|
Feb. 28, 2025
USD ($)
$ / shares
|
Oct. 24, 2024
$ / shares
shares
|
Jan. 26, 2024
$ / shares
shares
|
Dec. 31, 2023
$ / shares
|
Nov. 29, 2023
$ / shares
shares
|
Jun. 30, 2023
shares
|
Apr. 06, 2023
$ / shares
shares
|
Common Stock, Shares Authorized (in shares) |
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|
|
|
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|
500,000,000
|
|
500,000,000
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500,000,000
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500,000,000
|
500,000,000
|
|
500,000,000
|
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|
500,000,000
|
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|
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares |
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|
$ 0.001
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|
$ 0.001
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|
$ 0.001
|
|
$ 0.001
|
$ 0.001
|
$ 0.001
|
$ 0.001
|
|
|
$ 0.001
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|
|
Preferred Stock, Shares Authorized (in shares) |
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|
10,000,000
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10,000,000
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10,000,000
|
|
10,000,000
|
10,000,000
|
|
|
|
|
10,000,000
|
|
|
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares |
|
|
|
|
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|
$ 0.001
|
|
$ 0.001
|
|
$ 0.001
|
|
$ 0.001
|
$ 0.001
|
|
|
|
|
$ 0.001
|
|
|
Preferred Stock, Shares Outstanding (in shares) |
|
|
|
|
|
|
0
|
|
0
|
|
0
|
|
0
|
0
|
|
|
|
|
|
|
|
Stock Issued During Period, Value, New Issues | $ |
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|
|
|
|
|
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|
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|
$ 103,000
|
$ 2,840,000
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|
Payments of Stock Issuance Costs | $ |
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|
$ 176,000
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|
$ (0)
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|
$ 200,000
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Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |
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143,303
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|
Share Price (in dollars per share) | $ / shares |
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$ 100
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Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
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|
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|
$ 0.02
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Series A Warrants [Member] |
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|
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) |
|
1
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|
Number of Warrants Per Pre-funded Unit (in shares) |
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1
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|
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
|
$ 6.54
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|
Class of Warrants or Rights, Maximum Beneficial Ownership |
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4.99%
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Warrants and Rights Outstanding, Term (Year) |
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5 years
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|
Class of Warrant or Right, Fair Value Per Share (in dollars per share) | $ / shares |
|
$ 5.3597
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Pre-funded Warrants [Member] |
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|
|
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|
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) |
|
1
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|
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|
Number of Warrants Per Pre-funded Unit (in shares) |
|
1
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|
|
|
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|
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Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
|
$ 0.001
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|
Class of Warrants or Rights, Maximum Beneficial Ownership |
|
4.99%
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|
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|
Class of Warrant or Right, Fair Value Per Share (in dollars per share) | $ / shares |
|
$ 6.329
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Representative's Warrants [Member] |
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Class of Warrant or Right, Lock-up Period (Day) |
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180 days
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Class of Warrant or Right, Fair Value Per Share (in dollars per share) | $ / shares |
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$ 5.2125
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Equity-based Warrants [Member] |
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Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
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$ 0.01
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|
$ 0.01
|
|
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|
$ 125
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|
Warrants and Rights Outstanding, Term (Year) |
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5 years
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Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |
|
|
|
|
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|
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|
2,988
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|
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|
Class of Warrant Or Right Exercised In Period, Cashless (in shares) |
|
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|
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197,098
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|
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Class of Warrant Or Right Exercised In Period, Cash (in shares) |
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|
|
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|
695,334
|
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RF Innovations, Inc. [Member] |
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|
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|
|
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Stock Issued During Period, Shares, New Issues (in shares) |
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|
12,500
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Stock Issued During Period, Value, New Issues | $ |
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|
$ 100,000
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Common Stock, Discount for Lack of Marketability |
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25.60%
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Maximum Percentage of Shares Sold in Thirty Days |
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10.00%
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Underwriters [Member] | Series A Warrants [Member] |
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|
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|
Equity Offering, Option, Maximum Warrants (in shares) |
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|
206,422
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Class of Warrant or Right, Issued During Period (in shares) |
|
|
156,809
|
|
|
|
|
|
|
|
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|
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|
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|
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|
Underwriters [Member] | Representative's Warrants [Member] |
|
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|
|
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|
|
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|
Class of Warrant or Right, Issued During Period (in shares) |
|
91,985
|
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|
|
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|
|
|
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Research and Development Expense [Member] | RF Innovations, Inc. [Member] |
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Share-Based Payment Arrangement, Expense | $ |
|
|
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|
|
|
|
|
|
$ 100,000
|
|
$ 100,000
|
|
|
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Black-Scholes Model [Member] | Series A Warrants and the Representative's Warrants [Member] | Valuation Technique, Discounted Cash Flow [Member] |
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|
Warrants and Rights Outstanding, Measurement Input |
|
0.0417
|
|
|
|
|
|
|
|
|
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|
|
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|
|
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|
Black-Scholes Model [Member] | Series A Warrants and the Representative's Warrants [Member] | Measurement Input, Price Volatility [Member] |
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|
|
|
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|
|
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|
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|
|
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|
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|
Warrants and Rights Outstanding, Measurement Input |
|
1.4415
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
Black-Scholes Model [Member] | Equity-based Warrants [Member] | Measurement Input, Price Volatility [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
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|
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|
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|
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|
Warrants and Rights Outstanding, Measurement Input |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1.04
|
|
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|
Black-Scholes Model [Member] | Equity-based Warrants [Member] | Measurement Input, Discount Rate [Member] |
|
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|
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|
|
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|
|
|
|
|
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|
|
|
|
|
|
|
|
Warrants and Rights Outstanding, Measurement Input |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0.0404
|
|
|
|
|
Black-Scholes Model [Member] | Equity-based Warrants [Member] | Measurement Input, Expected Term [Member] |
|
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Warrants and Rights Outstanding, Measurement Input |
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|
5
|
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The 2023 Stock Plan [Member] |
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Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
200,000
|
|
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) |
|
|
|
|
|
|
75,633
|
|
75,633
|
|
|
|
75,633
|
|
|
|
|
|
|
|
|
Share-Based Compensation Arrangement by Share-Based Payment Award, Percentage of Outstanding Stock Maximum |
|
|
|
|
|
|
|
5.00%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized (in shares) |
124,852
|
|
|
|
47,116
|
|
|
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Private Placement [Member] |
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Shares Issued, Price Per Share (in dollars per share) | $ / shares |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 40
|
Equity Offering, Maximum Shares to be Issued (in shares) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
100,000
|
Stock Issued During Period, Shares, New Issues (in shares) |
|
|
|
|
|
|
|
|
|
|
|
|
|
71,000
|
|
|
|
|
|
|
|
Stock Issued During Period, Value, New Issues | $ |
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 2,840,000
|
|
|
|
|
|
|
|
Payments of Stock Issuance Costs | $ |
|
|
|
|
|
|
|
|
|
|
|
|
|
0
|
|
|
|
|
|
|
|
Proceeds from Issuance of Common Stock | $ |
|
|
|
|
|
|
|
|
$ 0
|
|
2,840,000
|
|
|
|
|
|
|
|
|
|
|
ATM Agreement [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Stock Issued During Period, Shares, New Issues (in shares) |
|
|
|
|
|
|
800
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Equity Offering, Maximum Offering Amount | $ |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 2,100,000
|
|
|
|
|
|
|
Proceeds from Issuance of Common Stock | $ |
|
|
|
|
|
|
$ 1,746
|
|
2,000
|
|
0
|
|
|
|
|
|
|
|
|
|
|
Proceeds from Issuance or Sale of Equity | $ |
|
|
|
|
|
|
1,746
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Underwritten Public Offering [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares |
|
$ 0.001
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Payments of Stock Issuance Costs | $ |
|
$ 1,000,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Number of Common Units Issued (in shares) |
|
458,691
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Number of Shares Per Common Unit (in shares) |
|
1
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Number of Warrants Per Common Unit (in shares) |
|
1
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Number of Pre-funded Units Issued (in shares) |
|
917,596
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Common Units Issued, Purchase Price (in dollars per share) | $ / shares |
|
$ 6.54
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Pre-funded Units Issued, Purchase Price (in dollars per share) | $ / shares |
|
$ 6.539
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Proceeds from Issuance or Sale of Equity | $ |
|
$ 10,000,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Commission Percentage |
|
8.00%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs | $ |
|
$ 1,500,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Underwritten Public Offering [Member] | Non-cash Expenses [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs | $ |
|
$ 500,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Over-Allotment Option [Member] | Underwriters [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Stock Issued During Period, Shares, New Issues (in shares) |
|
|
156,809
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Equity Offering, Option Period (Day) |
|
|
45 days
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Equity Offering, Option, Maximum Shares (in shares) |
|
|
206,422
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Restricted Stock [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount | $ |
|
|
|
|
|
|
0
|
|
0
|
|
|
|
$ 0
|
|
|
|
|
|
|
|
|
Share-Based Payment Arrangement, Expense | $ |
|
|
|
|
|
|
|
|
|
|
|
|
116,375
|
16,625
|
|
|
|
|
|
|
|
Restricted Stock [Member] | General and Administrative Expense [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Share-Based Payment Arrangement, Expense | $ |
|
|
|
|
|
|
|
|
|
|
|
|
116,375
|
16,625
|
|
|
|
|
|
|
|
Restricted Stock [Member] | Marketing Consultant [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Stock Issued During Period, Shares, Issued for Services (in shares) |
|
|
|
|
|
1,750
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Shares Issued, Price Per Share (in dollars per share) | $ / shares |
|
|
|
|
|
$ 76
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Stock Issued During Period, Value, Issued for Services | $ |
|
|
|
|
|
$ 133,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Month) |
|
|
|
|
|
12 months
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Share-Based Payment Arrangement, Option [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount | $ |
|
|
|
|
|
|
4,300,000
|
|
4,300,000
|
|
3,100,000
|
|
4,300,000
|
3,100,000
|
|
|
|
|
|
|
|
Share-Based Payment Arrangement, Expense | $ |
|
|
|
|
|
|
|
|
|
|
|
|
1,500,000
|
600,000
|
|
|
|
|
|
|
|
Share-Based Payment Arrangement, Option [Member] | General and Administrative Expense [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Share-Based Payment Arrangement, Expense | $ |
|
|
|
|
|
|
|
|
|
|
|
|
1,300,000
|
500,000
|
|
|
|
|
|
|
|
Share-Based Payment Arrangement, Option [Member] | Research and Development Expense [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Share-Based Payment Arrangement, Expense | $ |
|
|
|
|
|
|
|
|
|
|
|
|
200,000
|
100,000
|
|
|
|
|
|
|
|
Share-Based Payment Arrangement, Option [Member] | Black-Scholes Model [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grant Date Fair Value | $ |
|
|
|
|
|
|
$ 2,600,000
|
|
$ 2,600,000
|
|
|
|
$ 2,600,000
|
|
|
|
|
|
|
|
|
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Discount Rate |
|
|
|
|
|
|
|
|
|
|
|
|
0.00%
|
|
|
|
|
|
|
|
|
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year) |
|
|
|
|
|
|
|
|
|
|
|
|
6 years 3 months
|
|
|
|
|
|
|
|
|
Share-Based Payment Arrangement, Option [Member] | Black-Scholes Model [Member] | Minimum [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Share Price (in dollars per share) | $ / shares |
|
|
|
|
|
|
$ 1.99
|
|
$ 1.99
|
|
|
|
$ 1.99
|
|
|
|
|
|
|
|
|
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Discount Rate |
|
|
|
|
|
|
|
|
|
|
|
|
4.17%
|
|
|
|
|
|
|
|
|
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate |
|
|
|
|
|
|
|
|
|
|
|
|
110.00%
|
|
|
|
|
|
|
|
|
Share-Based Payment Arrangement, Option [Member] | Black-Scholes Model [Member] | Maximum [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Share Price (in dollars per share) | $ / shares |
|
|
|
|
|
|
$ 56.2
|
|
$ 56.2
|
|
|
|
$ 56.2
|
|
|
|
|
|
|
|
|
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 Volatility Rate |
|
|
|
|
|
|
|
|
|
|
|
|
138.00%
|
|
|
|
|
|
|
|
|
Share-Based Payment Arrangement, Option [Member] | The 2023 Stock Plan [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Month) |
|
|
|
|
|
|
|
|
|
|
|
|
4 years
|
|
|
|
|
|
|
|
|
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |
|
|
|
|
|
|
|
|
|
|
|
|
143,303
|
|
|
|
|
|
|
|
|
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) |
|
|
|
|
|
|
|
|
|
|
|
|
10 years
|
|
|
|
|
|
|
|
|
Warrant [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Share-Based Payment Arrangement, Expense | $ |
|
|
|
|
|
|
|
|
|
|
|
|
$ 100,000
|
100,000
|
|
|
|
|
|
|
|
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $ |
|
|
|
|
|
|
$ 0
|
|
$ 0
|
|
$ 100,000
|
|
$ 0
|
$ 100,000
|
|
|
|
|
|
|
|
Warrant [Member] | Black-Scholes Model [Member] | Minimum [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Share Price (in dollars per share) | $ / shares |
|
|
|
|
|
|
$ 0
|
|
$ 0
|
|
$ 2
|
|
$ 0
|
$ 2
|
|
|
|
|
|
|
|
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Discount Rate |
|
|
|
|
|
|
|
|
|
|
|
|
|
4.04%
|
|
|
|
|
|
|
|
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate |
|
|
|
|
|
|
|
|
|
|
|
|
|
104.00%
|
|
|
|
|
|
|
|
Warrant [Member] | Black-Scholes Model [Member] | Maximum [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Share Price (in dollars per share) | $ / shares |
|
|
|
|
|
|
|
|
|
|
$ 5
|
|
|
$ 5
|
|
|
|
|
|
|
|
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Discount Rate |
|
|
|
|
|
|
|
|
|
|
|
|
|
4.54%
|
|
|
|
|
|
|
|
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate |
|
|
|
|
|
|
|
|
|
|
|
|
|
119.00%
|
|
|
|
|
|
|
|