v3.26.3
Note 5 - Stockholders' Equity - 10Q (Details Textual)
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
May 19, 2026
USD ($)
$ / shares
shares
May 07, 2026
USD ($)
$ / shares
shares
Mar. 31, 2026
USD ($)
$ / shares
shares
Mar. 11, 2026
USD ($)
shares
Feb. 17, 2026
USD ($)
$ / shares
shares
Jan. 09, 2026
shares
Dec. 31, 2025
$ / shares
shares
Jan. 16, 2024
Jun. 30, 2026
USD ($)
shares
May 30, 2026
USD ($)
shares
Jan. 31, 2026
USD ($)
shares
Jul. 31, 2025
USD ($)
shares
Jun. 30, 2024
USD ($)
Jun. 30, 2026
USD ($)
shares
Jun. 30, 2026
USD ($)
$ / shares
shares
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
shares
Dec. 31, 2024
USD ($)
$ / shares
shares
Stock Issued During Period, Shares, Stock Splits (in shares)           65,548                        
Common Stock, Capital Shares Reserved for Future Issuance             4,213,178                   4,213,178  
Stock Issued During Period, Shares, Issued for Services (in shares)                 6,751               5,208 268
Stock Issued During Period, Value, Issued for Services | $                 $ 15,000         $ 15,000     $ 50,000 $ 37,500
Stock Issued During Period, Shares, Warrant Exercise (in shares)       3,433           1,663,452   9,600            
Proceeds from Warrant Exercises | $       $ 4,800           $ 1,975,700   $ 156,000 $ 1,400,000   $ 1,980,524 $ 209 $ 156,209 $ 2,367,133
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares             $ 61.05               $ 1.18     $ 55.39
Stock Incentive Plan 2020 [Member]                                    
Common Stock, Capital Shares Reserved for Future Issuance             338,293   331,342         331,342 331,342   338,293  
February 2026 Offering Warrants [Member]                                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights         865,804                          
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares         $ 2.31                          
Existing Stock Purchase Warrants [Member] | Certain Existing Warrant Holders [Member]                                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights     1,269,316                              
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares     $ 1.36                              
Class of Warrant or Right, Exercised   779,443 634,658                              
Class of Warrant or Right, Exercised, Weighted Average Exercise Price | $ / shares     $ 1.36                              
Existing Stock Purchase Warrants [Member] | Certain Existing Warrant Holders [Member] | Minimum [Member]                                    
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares     1.4103                              
Existing Stock Purchase Warrants [Member] | Certain Existing Warrant Holders [Member] | Maximum [Member]                                    
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares     $ 32.75                              
New Warrants [Member] | Certain Existing Warrant Holders [Member]                                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   1,558,886                                
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares   $ 1.65                                
May 2026 Offering Warrants [Member]                                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 4,054,054                                  
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares $ 1.48                                  
February 2026 Offering [Member]                                    
Stock Issued During Period, Shares, New Issues         432,902                          
Proceeds from Issuance or Sale of Equity | $         $ 885,000                          
Warrant Exercise Inducement Letters [Member]                                    
Stock Issued During Period, Shares, New Issues     560,658                              
Common Stock, Capital Shares Reserved for Future Issuance     74,000                              
Proceeds from (Repurchase of) Equity | $   $ 844,100 $ 762,700                              
Warrant Exercise Inducement Letters [Member] | Existing Stock Purchase Warrants [Member] | Certain Existing Warrant Holders [Member]                                    
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares   $ 1.1877                                
May 2026 Offering [Member]                                    
Stock Issued During Period, Shares, New Issues 2,027,027                                  
Proceeds from Issuance or Sale of Equity | $ $ 2,709,800                                  
At-the-Market Program [Member]                                    
Stock Issued During Period, Shares, New Issues                     23,882           100,533 80,487
Proceeds from Issuance of Common Stock | $                     $ 71,200           $ 4,100,000 $ 4,900,000
Reverse Stock Split [Member]                                    
Stockholders' Equity Note, Stock Split, Conversion Ratio           25   15