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 ($)
$ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jan. 01, 2026
Mar. 09, 2017
Feb. 28, 2025
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2022
Nov. 08, 2022
Feb. 28, 2015
Fortress [Member]                      
Percentage of Fully-diluted Outstanding Equity                     2.50%
Percentage of Equity or Debt Fnancing                     2.50%
Stock Issued During Period, Shares, New Issues (in shares) 111,209                    
Fortress [Member] | Avenue Baergic Founders Agreement [Member]                      
Excess in Net Assets Value   $ 100,000                  
Fortress [Member] | Management Services Agreement [Member]                      
Service Provided, Expense Recorded, Percentage     50.00%                
Costs and Expenses       $ 100 $ 100 $ 300 $ 300        
BaergicBio, Inc.[Member] | Founders Agreement and Management Services Agreement [Member]                      
Percentage of Equity Fee                   2.50%  
Research And Development Expense, Licenses Acquired               $ 100      
Annual Equity Fee Expense       $ 0 $ 0 $ 0 $ 100        
Common Stock, Issuable, Shares (in shares)         23,474   23,474        
Percentage Of Additional Consideration Of Equity Fee                 2.50%    
BaergicBio, Inc.[Member] | Avenue Baergic Founders Agreement [Member]                      
Percentage Of Additional Consideration Of Equity Fee                 2.50%    
Percentage Considered For The Calculation Of One-Time Fee                 4.50%    
Annual Consulting Fee   500                  
Increase in Annual Consulting Fee   $ 1,000