v3.25.2
Note 4 - Equity (Details Textual)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
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)             500,000,000   500,000,000   500,000,000   500,000,000 500,000,000   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   $ 0.001 $ 0.001 $ 0.001 $ 0.001     $ 0.001    
Preferred Stock, Shares Authorized (in shares)             10,000,000   10,000,000   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             $ 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 | $                         $ 103,000 $ 2,840,000              
Payments of Stock Issuance Costs | $                 $ 176,000   $ (0)   $ 200,000                
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)                         143,303                
Share Price (in dollars per share) | $ / shares                                 $ 100        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares                                   $ 0.02      
Series A Warrants [Member]                                          
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)   1                                      
Number of Warrants Per Pre-funded Unit (in shares)   1                                      
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares   $ 6.54                                      
Class of Warrants or Rights, Maximum Beneficial Ownership   4.99%                                      
Warrants and Rights Outstanding, Term (Year)   5 years                                      
Class of Warrant or Right, Fair Value Per Share (in dollars per share) | $ / shares   $ 5.3597                                      
Pre-funded Warrants [Member]                                          
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)   1                                      
Number of Warrants Per Pre-funded Unit (in shares)   1                                      
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares   $ 0.001                                      
Class of Warrants or Rights, Maximum Beneficial Ownership   4.99%                                      
Class of Warrant or Right, Fair Value Per Share (in dollars per share) | $ / shares   $ 6.329                                      
Representative's Warrants [Member]                                          
Class of Warrant or Right, Lock-up Period (Day)   180 days                                      
Class of Warrant or Right, Fair Value Per Share (in dollars per share) | $ / shares   $ 5.2125                                      
Equity-based Warrants [Member]                                          
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares                   $ 0.01   $ 0.01         $ 125        
Warrants and Rights Outstanding, Term (Year)                                 5 years        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                                 2,988        
Class of Warrant Or Right Exercised In Period, Cashless (in shares)                         197,098                
Class of Warrant Or Right Exercised In Period, Cash (in shares)                         695,334                
RF Innovations, Inc. [Member]                                          
Stock Issued During Period, Shares, New Issues (in shares)       12,500                                  
Stock Issued During Period, Value, New Issues | $       $ 100,000                                  
Common Stock, Discount for Lack of Marketability       25.60%                                  
Maximum Percentage of Shares Sold in Thirty Days       10.00%                                  
Underwriters [Member] | Series A Warrants [Member]                                          
Equity Offering, Option, Maximum Warrants (in shares)     206,422                                    
Class of Warrant or Right, Issued During Period (in shares)     156,809                                    
Underwriters [Member] | Representative's Warrants [Member]                                          
Class of Warrant or Right, Issued During Period (in shares)   91,985                                      
Research and Development Expense [Member] | RF Innovations, Inc. [Member]                                          
Share-Based Payment Arrangement, Expense | $                   $ 100,000   $ 100,000                  
Black-Scholes Model [Member] | Series A Warrants and the Representative's Warrants [Member] | Valuation Technique, Discounted Cash Flow [Member]                                          
Warrants and Rights Outstanding, Measurement Input   0.0417                                      
Black-Scholes Model [Member] | Series A Warrants and the Representative's Warrants [Member] | Measurement Input, Price Volatility [Member]                                          
Warrants and Rights Outstanding, Measurement Input   1.4415                                      
Black-Scholes Model [Member] | Equity-based Warrants [Member] | Measurement Input, Price Volatility [Member]                                          
Warrants and Rights Outstanding, Measurement Input                                 1.04        
Black-Scholes Model [Member] | Equity-based Warrants [Member] | Measurement Input, Discount Rate [Member]                                          
Warrants and Rights Outstanding, Measurement Input                                 0.0404        
Black-Scholes Model [Member] | Equity-based Warrants [Member] | Measurement Input, Expected Term [Member]                                          
Warrants and Rights Outstanding, Measurement Input                                 5        
The 2023 Stock Plan [Member]                                          
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                                
Private Placement [Member]                                          
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%