v3.25.2
Note 7 - Stockholders' Equity - Schedule of Warrant Activity (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2023
Jul. 01, 2023
Outstanding (in shares) 80 80    
Warrants Outstanding, Weighted Average Exercise Price (in dollars per share) $ 72.1 $ 72.1    
Outstanding, Aggregate Fair Market Value $ 3,553 $ 3,747   $ 3,747
Outstanding, Weighted Average Remaining Contractual Term (Year) 7 months 17 days 1 year 7 months 6 days 2 years 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) (3) 0    
Canceled or expired, Weighted Average Exercise Price (in dollars per share) $ 154 $ 0    
Canceled or expired, Aggregate Fair Market Value $ (194) $ 0    
Outstanding (in shares) 77 80 80  
Warrants Outstanding, Weighted Average Exercise Price (in dollars per share) $ 69.04 $ 72.1 $ 72.1  
Outstanding, Weighted Average Exercise Price (in dollars per share) $ 69.04 $ 72.1 $ 72.1  
Outstanding (in shares) 77 80 80  
Class of Warrant or Rights, Warrants Issued March 26, 2020 [Member]        
Outstanding (in shares) 1      
Outstanding (in shares) 0 1    
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 1    
Class of Warrant or Rights, Warrants Issued March 30, 2020 [Member]        
Outstanding (in shares) 2      
Outstanding (in shares) 0 2    
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 2    
Class of Warrant or Rights, Warrants Issued October 23, 2020 [Member]        
Outstanding (in shares) 15      
Outstanding (in shares) 15 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) 15 15    
Class of Warrant or Rights, Warrants Issued October 28, 2020 [Member]        
Outstanding (in shares) 6      
Outstanding (in shares) 6 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) 6 6    
Class of Warrant or Rights, Warrants Issued February 16, 2021 [Member]        
Outstanding (in shares) 6      
Outstanding (in shares) 6 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) 6 6    
Class of Warrant or Rights, Warrants Issued April 12, 2021 [Member]        
Outstanding (in shares) 50      
Outstanding (in shares) 50 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) 50 50