v3.25.4
Note 3 - Equity (Details Textual)
 1 Months Ended 3 Months Ended 4 Months Ended 9 Months Ended 10 Months Ended
Nov. 21, 2025
USD ($)
Nov. 18, 2025
USD ($)
$ / shares
shares
Aug. 25, 2025
USD ($)
shares
Aug. 11, 2025
shares
Jul. 22, 2025
$ / shares
shares
Jul. 21, 2025
$ / shares
shares
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
Dec. 31, 2025
USD ($)
$ / shares
shares
Jul. 31, 2025
shares
Aug. 31, 2023
Dec. 31, 2025
USD ($)
$ / shares
shares
Sep. 30, 2025
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
Sep. 30, 2024
USD ($)
Dec. 31, 2025
USD ($)
$ / shares
shares
Dec. 31, 2025
USD ($)
$ / shares
shares
Dec. 31, 2024
USD ($)
Dec. 31, 2025
USD ($)
$ / shares
shares
Mar. 31, 2025
USD ($)
$ / shares
shares
Feb. 28, 2025
USD ($)
Nov. 29, 2023
$ / shares
shares
Jun. 30, 2023
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  
Preferred Stock, Shares Authorized (in shares)                         10,000,000     10,000,000         10,000,000 10,000,000   10,000,000 10,000,000   10,000,000  
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  
Preferred Stock, Shares Outstanding (in shares)                         0     0         0 0   0 0      
Payments of Stock Issuance Costs | $                                           $ (0) $ 1,052,000          
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares)       177,652                   57,331               234,983            
Share-Based Payment Arrangement, Accelerated Cost | $                                           $ 3,700,000            
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)                                           5,000            
Stock Issued During Period, Value, New Issues | $                               $ 860,000 $ 473,000 $ 1,882,000   $ 101,000                
Payments of Financing Costs for Warrants Issued | $                                           $ 450,000 (0)          
Proceeds from Warrant Exercises | $                                           $ 5,000 1,000          
Class of Warrant or Right, Outstanding (in shares)                         25,003     25,003         25,003 25,003   25,003 25,003      
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                                        
Warrants and Rights Outstanding, Term (Year)               5 years                                        
Class of Warrants or Rights, Maximum Beneficial Ownership               4.99%                                        
Class of Warrant or Right, Fair Value Per Share (in dollars per share) | $ / shares               $ 5.3597                                        
Class of Warrant or Right, Outstanding (in shares)                         55,500     55,500         55,500 55,500   55,500        
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         $ 0.001     $ 0.001         $ 0.001 $ 0.001   $ 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                                        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)   4,501,666                                                    
Class of Warrant or Right, Exercised During Period (in shares)                         4,501,666                              
Proceeds from Warrant Exercises | $                         $ 4.5                              
Representative's Warrants [Member]                                                        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares           $ 2.671                                            
Warrants and Rights Outstanding, Term (Year)           5 years                                            
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           $ 1.5   $ 5.2125                                        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)           88,656                                            
Class of Warrant or Right, Outstanding (in shares)                         180,641     180,641         180,641 180,641   180,641        
Series C Warrants [Member]                                                        
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)   1                                                    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares   $ 0.8607                                                    
Warrants and Rights Outstanding, Term (Year)   5 years 6 months                                                    
Class of Warrants or Rights, Maximum Beneficial Ownership   4.99%                                                    
Class of Warrant or Right, Fair Value Per Share (in dollars per share) | $ / shares   $ 0.81                                                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)   9,003,332                                                    
Class of Warrant or Right, Outstanding (in shares)                         9,003,332     9,003,332         9,003,332 9,003,332   9,003,332        
Series C Warrants [Member] | Maximum [Member]                                                        
Class of Warrants or Rights, Maximum Beneficial Ownership   9.99%                                                    
Series C Warrants [Member] | Measurement Input, Discount Rate [Member]                                                        
Warrants and Rights Outstanding, Measurement Input   0.0376                                                    
Series C Warrants [Member] | Measurement Input, Price Volatility [Member]                                                        
Warrants and Rights Outstanding, Measurement Input   1.548                                                    
Pre-funded and Series C Warrants [Member]                                                        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares   $ 0.001                                                    
Class of Warrant or Right, Purchase Price of Warrants or Rights (in dollars per share) | $ / shares   $ 1.1097                                                    
Existing Warrants [Member]                                                        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares           $ 6.54                                            
Proceeds from Issuance or Sale of Equity | $ $ 2,500,000                                                      
Class of Warrant or Right, Outstanding (in shares)           1,477,596                                            
Class of Warrant or Right, Exchanges, Percentage of Underlying Shares           100.00%                                            
Payments for Warrant Issuance Fees | $ $ 300,000                                                      
Existing Warrants at 1.723 Exercise Price [Member]                                                        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares         $ 1.723 $ 1.723                                            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)         1,477,596                                              
Stock Issued During Period, Shares, Warrants Exercised (in shares)           855,000                                            
Class of Warrant or Right, Exercised During Period, Exercise Price (in dollars per share) | $ / shares           $ 1.723                                            
Existing Warrants at 1.722 Exercise Price [Member]                                                        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares           $ 1.722                                            
Warrants and Rights Outstanding, Term (Year)           5 years 6 months                                            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)           622,596                                            
Modified Existing Warrants [Member]                                                        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares         $ 0.001 $ 0.001                                            
Warrants and Rights Outstanding, Term (Year)           5 years 6 months                                            
Stock Issued During Period, Shares, Warrants Exercised (in shares)         622,596                                              
Series B Warrants [Member]                                                        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares           $ 1.723                                            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)           1,477,596                                            
Class of Warrant or Right, Outstanding (in shares)                         1,477,596     1,477,596         1,477,596 1,477,596   1,477,596        
Inducement Warrants [Member]                                                        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares         $ 1.723                                              
Class of Warrants or Rights, Maximum Beneficial Ownership           4.99%                                            
Class of Warrant or Right, Fair Value Per Share (in dollars per share) | $ / shares           $ 1.56                                            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)         1,477,596                                              
Issued Warrants [Member] | Measurement Input, Discount Rate [Member] | Maximum [Member]                                                        
Warrants and Rights Outstanding, Measurement Input           0.0388                                            
Issued Warrants [Member] | Measurement Input, Discount Rate [Member] | Minimum [Member]                                                        
Warrants and Rights Outstanding, Measurement Input           0.0393                                            
Issued Warrants [Member] | Measurement Input, Price Volatility [Member] | Maximum [Member]                                                        
Warrants and Rights Outstanding, Measurement Input           1.51                                            
Issued Warrants [Member] | Measurement Input, Price Volatility [Member] | Minimum [Member]                                                        
Warrants and Rights Outstanding, Measurement Input           1.50                                            
Common Warrants [Member]                                                        
Class of Warrant or Right, Outstanding (in shares)                         33,131     33,131         33,131 33,131   33,131        
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                                        
Black-Scholes Model [Member] | Series A Warrants and the Representative's Warrants [Member] | Measurement Input, Discount Rate [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                                        
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, 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                                  
ATM Agreement [Member]                                                        
Equity Offering, Maximum Offering Amount | $                         $ 3,500,000     $ 3,500,000         $ 3,500,000 $ 3,500,000   $ 3,500,000   $ 2,100,000    
Stock Issued During Period, Shares, New Issues (in shares)                                               2,386,216        
Proceeds from Issuance of Common Stock | $                                               $ 3,400,000        
Payments of Stock Issuance Costs | $                                               100,000        
Amended ATM Agreement [Member]                                                        
Equity Offering, Increase in Offering Amount | $     $ 1,400,000                                                  
Lincoln Park Purchase Agreement [Member]                                                        
Equity Offering, Maximum Offering Amount | $     $ 15,000,000                                                  
Stock Issued During Period, Shares, New Issues (in shares)     261,932                                   10,000              
Payments of Stock Issuance Costs | $                                         $ 300,000              
Underwritten Public Offering [Member]                                                        
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                                        
Commission Percentage               8.00%                                        
Proceeds from Issuance or Sale of Equity | $               $ 10,000,000                                        
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs | $               1,500,000                                        
Proceeds From Issuance of Common Stock, Net of Issuance Costs | $               9,000,000                                        
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                                      
Securities Purchase Agreement [Member]                                                        
Commission Percentage   8.00%                                                    
Proceeds from Issuance or Sale of Equity | $   $ 5,000,000                                                    
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs | $   $ 36,000                                                    
Equity Offering, Covenant, Common Stock Share Price (in dollars per share) | $ / shares   $ 1.1107                                                    
Payments of Financing Costs for Warrants Issued | $   $ 450,000                                                    
Payments of Placement Agent Fees | $   $ 50,000                                                    
Board of Directors Chairman [Member]                                                        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares)       8,773                                                
Executive Chair of the Board [Member]                                                        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares)       65,542                                                
Director [Member]                                                        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares)       3,750                                                
Chief Executive Officer [Member]                                                        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares)       45,000                                                
Chief Technology Officer [Member]                                                        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares)       8,773                                                
Chief Medical Officer [Member]                                                        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares)       13,159                                                
Chief Financial Officer [Member]                                                        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares)       32,655                                                
Restricted Stock [Member]                                                        
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount | $                                                 $ 0      
Share-Based Payment Arrangement, Expense | $                               0     $ 33,250     0 99,750          
Restricted Stock [Member] | General and Administrative Expense [Member]                                                        
Share-Based Payment Arrangement, Expense | $                               0     33,250     0 99,750          
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 | $                         100,000     100,000         100,000 100,000   100,000        
Share-Based Payment Arrangement, Option [Member] | General and Administrative Expense [Member]                                                        
Share-Based Payment Arrangement, Expense | $                               0     300,000     3,600,000 1,000,000          
Share-Based Payment Arrangement, Option [Member] | Research and Development Expense [Member]                                                        
Share-Based Payment Arrangement, Expense | $                               100,000     100,000     600,000 200,000          
Share-Based Payment Arrangement, Option [Member] | Black-Scholes Model [Member]                                                        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grant Date Fair Value | $                         9,000     9,000         9,000 $ 9,000   9,000        
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Discount Rate                                           4.06%            
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                                           139.00%            
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)                                           5,000            
Warrant [Member]                                                        
Share-Based Payment Arrangement, Expense | $                               0     $ 100,000     $ 0 $ 100,000          
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $                         $ 0     $ 0         $ 0 $ 0   $ 0