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Note 6 - Related Party Transactions (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Jul. 07, 2023
Mar. 31, 2025
Jun. 30, 2025
Mar. 31, 2024
Jan. 29, 2024
Dec. 31, 2023
Common Stock, Shares, Issued (in shares)   2,497,033 4,022,625 942,575    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)           $ 0.02
Termination Agreement [Member] | The Warrant [Member]            
Common Stock, Shares, Issued (in shares)         80,000  
Shares Issued, Price Per Share (in dollars per share)         $ 100  
Class of Warrant or Right, Value of Securities Called by Warrants or Rights $ 8,000          
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 0.02          
Warrants and Rights Outstanding, Term (Year) 5 years          
Interest Held in Company Receiving Warrants 20.00%          
Termination Agreement [Member] | The Warrant [Member] | Common Stock, 6 Months Lock-up Period [Member]            
Class of Warrant or Right, Lock-up Agreement Term of Underlying Shares (Day) 6 months          
Class of Warrant or Right, Percentage of Outstanding Stock 12.50%          
Termination Agreement [Member] | The Warrant [Member] | Common Stock, 12 Months Lock-up Period [Member]            
Class of Warrant or Right, Lock-up Agreement Term of Underlying Shares (Day) 12 months          
Consulting Firm Owned by Former CFO [MEmber] | Accounting and Financial Reporting Services [Member]            
Accounts Payable   $ 0   $ 100    
Consulting Firm Owned by Former CFO [MEmber] | Accounting and Financial Reporting Services [Member] | Maximum [Member]            
Related Party Transaction, Amounts of Transaction   100        
Management, Board of Director, and Family [Member] | The Bridge Offering [Member]            
Proceeds from Issuance of Debt   500        
Management [Member] | The Bridge Offering [Member]            
Proceeds from Issuance of Debt   400        
Related Party [Member] | The Bridge Offering [Member]            
Proceeds from Issuance of Debt   $ 100