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Note 14 - Stockholders' Equity (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
 9 Months Ended
Jun. 14, 2024
Jun. 08, 2023
Aug. 11, 2022
Sep. 30, 2024
Sep. 30, 2023
Sep. 26, 2024
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2022
Jun. 17, 2020
Common Stock, Shares Authorized (in shares)       200,000,000     200,000,000      
Common Stock, Par or Stated Value Per Share (in dollars per share)       $ 0.0001     $ 0.0001      
Preferred Stock, Shares Authorized (in shares)       50,000,000     50,000,000      
Preferred Stock, Par or Stated Value Per Share (in dollars per share)       $ 0.0001     $ 0.0001      
Common Stock, Shares, Outstanding (in shares)       6,149,202     5,972,638      
Payments of Stock Issuance Costs       $ (0) $ 160          
August 2022 Prefunded Warrants [Member]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)     87,500              
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)     $ 0.02              
August 2022 Common Warrants [Member]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)     1,265,547              
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)     1              
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)     $ 8.6         $ 2.32 $ 3.3  
Warrants and Rights Outstanding, Term (Year)     5 years              
August 2022 Common and Prefunded Warrants [Member]                    
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)     1              
Sale of Stock, Price Per Share (in dollars per share)     $ 8.58              
Warrants and Rights Outstanding, Term (Year)     5 years              
Warrants and Rights Outstanding     $ 6,000              
Pre-Funded Warrants [Member]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)   430,217                
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)   1                
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)   $ 0.0001 $ 0.02              
Tranche A Common Warrants [Member]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)   2,173,912                
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)   $ 3.18                
Warrants and Rights Outstanding, Term (Year)   5 years                
Tranche B Common Warrants [Member]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)   2,173,912   1,630,424     1,806,434      
Proceeds from Warrant Exercises $ 3,500                  
Stock Issued During Period, Shares, Warrants Exercised (in shares) 367,478                  
Common Warrants [Member]                    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)   $ 1.59                
Common Warrants Exchanged for PreFunded Warrants [Member]                    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)   $ 1.5899                
Securities Purchase Agreement Warrants [Member]                    
Warrants and Rights Outstanding   $ 5,000                
Payments of Stock Issuance Costs   $ 600                
Tranche B Pre-Funded Warrants [Member]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) 1,806,434     176,000            
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 0.0001     $ 0.0001            
Warrants and Rights Outstanding $ 5,100                  
Class of Warrant or Right, Issued During Period (in shares) 1,806,434                  
The 2020 Shelf [Member]                    
Sale of Stock, Maximum Amount of Equity Issuable                   $ 100,000
The August 2022 Offering [Member]                    
Stock Issued During Period, Shares, New Issues (in shares)     1,075,290              
Sale of Stock, Price Per Share (in dollars per share)     $ 8.6              
Proceeds from Issuance or Sale of Equity     $ 10,000              
Payment of Financing and Stock Issuance Costs     $ 900              
Securities Purchase Agreement [Member]                    
Stock Issued During Period, Shares, New Issues (in shares)   1,743,695                
Proceeds from Issuance or Sale of Equity   $ 4,000                
Payment of Financing and Stock Issuance Costs   $ 3,400                
The 2024 Shelf [Member]                    
Sale of Stock, Maximum Amount of Equity Issuable           $ 100,000        
Restricted Stock [Member]                    
Common Stock, Shares, Outstanding (in shares)       19,019