v3.26.3
Note 7 - Stockholders' Equity - Schedule of Warrant Activity (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Outstanding (in shares) 77 80  
Warrants Outstanding, Weighted Average Exercise Price (in dollars per share) $ 69.04 $ 72.1  
Outstanding, Aggregate Fair Market Value $ 0 $ 3,553 $ 3,747
Outstanding, Weighted Average Remaining Contractual Term (Year)   7 months 17 days 1 year 7 months 6 days
Issued (in shares) 0 0  
Issued, Weighted Average Exercise Price (in dollars per share) $ 0 $ 0  
Issued, Aggregate Fair Market Value $ 0 $ 0  
Exercised (in shares) 0 0  
Exercised, Weighted Average Exercise Price (in dollars per share) $ 0 $ 0  
Exercised, Aggregate Fair Market Value $ 0 $ 0  
Canceled or expired (in shares) (77) (3)  
Canceled or expired, Weighted Average Exercise Price (in dollars per share) $ 0 $ 154  
Canceled or expired, Aggregate Fair Market Value $ (3,553) $ (194)  
Outstanding (in shares) 0 77 80
Warrants Outstanding, Weighted Average Exercise Price (in dollars per share) $ 0 $ 69.04 $ 72.1
Outstanding, Weighted Average Exercise Price (in dollars per share) $ 0 $ 69.04 $ 72.1
Outstanding (in shares) 0 77 80
Class of Warrant or Rights, Warrants Issued March 26, 2020 [Member]      
Outstanding (in shares) 0    
Outstanding (in shares) 0 0  
Warrants Outstanding, Weighted Average Exercise Price (in dollars per share) $ 187.5    
Outstanding, Weighted Average Exercise Price (in dollars per share) $ 187.5    
Class Of Warrant Or Right, Expiration Date Mar. 25, 2025    
Outstanding (in shares) 0 0  
Class of Warrant or Rights, Warrants Issued March 30, 2020 [Member]      
Outstanding (in shares) 0    
Outstanding (in shares) 0 0  
Warrants Outstanding, Weighted Average Exercise Price (in dollars per share) $ 140.63    
Outstanding, Weighted Average Exercise Price (in dollars per share) $ 140.63    
Class Of Warrant Or Right, Expiration Date Mar. 27, 2025    
Outstanding (in shares) 0 0  
Class of Warrant or Rights, Warrants Issued October 23, 2020 [Member]      
Outstanding (in shares) 15    
Outstanding (in shares) 0 15  
Warrants Outstanding, Weighted Average Exercise Price (in dollars per share) $ 86.25    
Outstanding, Weighted Average Exercise Price (in dollars per share) $ 86.25    
Class Of Warrant Or Right, Expiration Date Oct. 21, 2025    
Outstanding (in shares) 0 15  
Class of Warrant or Rights, Warrants Issued October 28, 2020 [Member]      
Outstanding (in shares) 6    
Outstanding (in shares) 0 6  
Warrants Outstanding, Weighted Average Exercise Price (in dollars per share) $ 80.63    
Outstanding, Weighted Average Exercise Price (in dollars per share) $ 80.63    
Class Of Warrant Or Right, Expiration Date Oct. 28, 2025    
Outstanding (in shares) 0 6  
Class of Warrant or Rights, Warrants Issued February 16, 2021 [Member]      
Outstanding (in shares) 6    
Outstanding (in shares) 0 6  
Warrants Outstanding, Weighted Average Exercise Price (in dollars per share) $ 121.88    
Outstanding, Weighted Average Exercise Price (in dollars per share) $ 121.88    
Class Of Warrant Or Right, Expiration Date Feb. 11, 2026    
Outstanding (in shares) 0 6  
Class of Warrant or Rights, Warrants Issued April 12, 2021 [Member]      
Outstanding (in shares) 50    
Outstanding (in shares) 0 50  
Warrants Outstanding, Weighted Average Exercise Price (in dollars per share) $ 56.25    
Outstanding, Weighted Average Exercise Price (in dollars per share) $ 56.25    
Class Of Warrant Or Right, Expiration Date Apr. 07, 2026    
Outstanding (in shares) 0 50