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Note 9 - Stockholders' Equity (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended 11 Months Ended
Sep. 12, 2024
Jul. 25, 2024
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2025
Jan. 31, 2025
Stock Issued During Period, Value, New Issues     $ 581 $ 7,816 $ 5,395 $ 165      
Share Purchase Agreement [Member] | New Circle Principal Investments LLC [Member]                  
Equity Offering, Maximum Amount   $ 50,000              
Equity Offering, Exchange Cap, Shares (in shares)   1,721,755              
Equity Offering, Exchange Cap, Minimum Average Price Per Share (in dollars per share)   $ 1.41              
Equity Offering, Period (Month)   36 months              
Equity Offering, Maximum Beneficial Ownership, Percentage   4.99%              
Equity Offering, Purchase Price, Percentage of Volume Weighted Average Price for One Day or Intraday Trading Period   96.50%              
Equity Offering, Purchase Price, Percentage of Volume Weighted Average Price for Three Consecutive Day Trading Period   97.50%              
Equity Offering, Maximum Shares, Percentage of Average Daily Trading Volume   100.00%              
Equity Offering, Maximum Shares Per Day (in shares)   400,000              
Stock Issued During Period, Shares, New Issues (in shares)   225,563           3,480,713  
Stock Issued During Period, Value, New Issues   $ 282           $ 6,480  
Stock Issuance, Commitment Fee   $ 200              
At Market Issuance Sales Agreement (the “ATM”) [Member] | Alliance Global Partners (“A.G.P.”) [Member]                  
Equity Offering, Maximum Amount $ 2,600               $ 15,292
Equity Offering, Period (Month) 36 months                
Stock Issued During Period, Shares, New Issues (in shares)             6,395,643    
Stock Issued During Period, Value, New Issues             $ 8,825    
Equity Offering, Cash Commission, Percentage of Gross Proceeds 3.00%