Quarterly report [Sections 13 or 15(d)]

Note 4 - Related Party Agreements (Details Textual)

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Note 4 - Related Party Agreements (Details Textual) - USD ($)
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jan. 02, 2025
Mar. 09, 2017
Feb. 28, 2015
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Dec. 31, 2022
Nov. 08, 2022
Fortress [Member]                    
Percentage of Fully-diluted Outstanding Equity     2.50%         2.50%    
Percentage of Equity or Debt Fnancing     2.50%              
Stock Issued During Period, Shares, New Issues (in shares) 22,476       31,110          
Research And Development Expense, Licenses Acquired               $ 0.2    
Annual Equity Fee Expense       $ 0 $ 14,000   $ 200,000      
Financing Equity Fee           $ 100,000        
Common Stock, Issuable, Shares (in shares)         4,023   4,023      
Fortress [Member] | Avenue Baergic Founders Agreement [Member]                    
Excess in Net Assets Value   $ 100,000,000                
Fortress [Member] | Management Services Agreement [Member]                    
Costs and Expenses       $ 100,000 $ 100,000 $ 400,000 $ 400,000      
Fortress [Member] | Financing Equity Fee [Member]                    
Stock Issued During Period, Shares, New Issues (in shares)           23,474        
Fortress [Member] | Research and Development Expense [Member] | Management Services Agreement [Member]                    
Service Provided, Expense Recorded, Percentage     50.00%              
Fortress [Member] | General and Administrative Expense [Member] | Management Services Agreement [Member]                    
Service Provided, Expense Recorded, Percentage     50.00%              
BaergicBio, Inc.[Member] | Avenue Baergic Founders Agreement [Member]                    
Percentage of Equity Fee                   2.50%
Percentage Of Additional Consideration Of Equity Fee                 2.50%  
Percentage Considered For The Calculation Of One-Time Fee                 4.50%  
Term of Agreement (Year)   5 years                
Annual Consulting Fee   $ 500,000                
Increase in Annual Consulting Fee   $ 1,000,000