Quarterly report [Sections 13 or 15(d)]

Note 7 - Stockholder's Equity (Details Textual)

v3.25.3
Note 7 - Stockholder's Equity (Details Textual)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended 29 Months Ended
Jun. 24, 2024
shares
May 10, 2024
$ / shares
Feb. 03, 2023
USD ($)
Mar. 31, 2025
USD ($)
shares
Sep. 30, 2025
USD ($)
$ / shares
shares
Sep. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2024
$ / shares
shares
Apr. 28, 2024
USD ($)
$ / shares
shares
Jan. 05, 2024
USD ($)
$ / shares
shares
Nov. 30, 2023
$ / shares
shares
Jan. 31, 2023
$ / shares
shares
Jan. 30, 2023
shares
Sep. 22, 2022
Dec. 31, 2021
shares
Sep. 13, 2019
$ / shares
Sep. 13, 2016
shares
Preferred Stock, Shares Authorized (in shares)         2,000,000     2,000,000                 2,000,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares         $ 0.0001     $ 0.0001                  
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares   $ 0.0001     $ 0.0001     0.0001                  
Proceeds from Issuance of Common Stock | $         $ 2,094 $ 862                      
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares         $ 8.64     $ 8.64                  
Class of Warrant or Right, Outstanding (in shares)         1,476,200     1,476,200                  
Common Stock, Shares, Issued (in shares)         3,183,558     2,108,670                  
Invagen Pharmaceuticals Inc [Member]                                  
Contingent Fee, Percentage of Proceeds of Future Financings     7.50%                            
Contingent Fee, Maximum Allowable Amount | $     $ 4,000                            
Payment of Contingent Fee | $         $ 200   $ 1,400                    
Restricted Stock Units (RSUs) [Member]                                  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $         $ 100                        
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)         1 year                        
Deferred Restricted Stock Units [Member]                                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number (in shares)         235,000                        
Share-Based Payment Arrangement, Option [Member]                                  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $         $ 200                        
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)         10 months 24 days                        
Two Thousand Fifteen Incentive Plan [Member]                                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) 5,070,223                           3,556    
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)         4,575,868                        
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) 10 years                                
Two Thousand Fifteen Incentive Plan [Member] | Maximum [Member] | Incentive Stock Options [Member]                                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) 5,000,000                                
Two Thousand Fifteen Incentive Plan [Member] | Maximum [Member] | Share-Based Payment Arrangement, Nonemployee [Member]                                  
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)                         70,223        
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) 500,000                                
January 2023 Warrants [Member]                                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                       25,871          
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares                   $ 22.545   $ 116.25          
November 2023 Warrants [Member]                                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                 221,333   194,667            
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares                 $ 22.545 $ 22.545 $ 22.545            
New Series A Warrants [Member]                                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                   220,538              
Warrants and Rights Outstanding, Term (Year)                   5 years              
Warrants and Rights Issued Classified as Deemed Dividend | $                   $ 600              
New Series B Warrants [Member]                                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                   220,538              
Warrants and Rights Issued Classified as Deemed Dividend | $                   $ 4,300              
January 2024 Warrants [Member]                                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                 441,076                
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares                 $ 22.545                
Class of Warrant or Right, Outstanding (in shares)         0                        
October 2022 Warrants [Member]                                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                 27,271                
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares                 $ 116.25                
New Series C Warrants [Member]                                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                 689,680                
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares                 $ 6.2                
Warrants and Rights Issued Classified as Deemed Dividend | $                 $ 200                
Common Stock, Shares, Issued (in shares)                 0                
New Series D Warrants [Member]                                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                 689,680                
Warrants and Rights Issued Classified as Deemed Dividend | $                 $ 4,500                
May 2024 Warrant Inducement [Member]                                  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares                 $ 0.125                
ATM Agreement [Member]                                  
Stock Issued During Period, Shares, New Issues (in shares)       938,990                          
Proceeds from Issuance of Common Stock | $       $ 2,100                          
Commission Fee, Percent Fee   3.00%                              
Preferred Class A [Member]                                  
Preferred Stock, Shares Authorized (in shares)                                 250,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares                               $ 0.0001  
Preferred Stock, Convertible, Conversion Ratio                           1,125