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Note 7 - Stockholders' Equity - Schedule of Warrant Activity (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Sep. 30, 2025
Jun. 30, 2025
Outstanding (in shares) 77  
Warrants Outstanding, Weighted Average Exercise Price (in dollars per share) $ 69.04  
Outstanding, Aggregate Fair Market Value $ 3,553 $ 3,553
Outstanding, Weighted Average Remaining Contractual Term (Year) 4 months 17 days 7 months 17 days
Warrants issued (in shares) 0  
Warrants issued, Weighted Average Exercise Price (in dollars per share) $ 0  
Warrants issued, Aggregate Fair Market Value $ 0  
Warrants exercised (in shares) 0  
Warrants exercised, Weighted Average Exercise Price (in dollars per share) $ 0  
Warrants exercised, Aggregate Fair Market Value $ 0  
Warrants expired (in shares) 0  
Warrants expired,Weighted Average Exercise Price (in dollars per share) $ 0  
Warrants expired, Aggregate Fair Market Value $ 0  
Outstanding (in shares) 77 77
Warrants Outstanding, Weighted Average Exercise Price (in dollars per share) $ 69.04 $ 69.04