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Note 13 - Capital Stock (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 2 Months Ended 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Jun. 30, 2023
Mar. 30, 2023
Mar. 03, 2023
Dec. 30, 2020
Jun. 30, 2023
Sep. 30, 2024
Sep. 30, 2024
Jun. 30, 2024
Sep. 30, 2023
Jun. 30, 2023
Jun. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
May 31, 2021
Common Stock, Shares Authorized (in shares)           600,000,000 600,000,000         600,000,000   300,000,000  
Common Stock, Par or Stated Value Per Share (in dollars per share)       $ 0.0001   $ 0.0001 $ 0.0001         $ 0.0001   $ 0.0001  
Preferred Stock, Shares Authorized (in shares)           1,000,000 1,000,000         1,000,000   1,000,000  
Preferred Stock, Par or Stated Value Per Share (in dollars per share)           $ 0.0001 $ 0.0001         $ 0.0001   $ 0.0001  
Common Stock, Shares, Issued (in shares)           6,857,170 6,857,170         6,857,170   6,421,084  
Preferred Stock, Shares Issued (in shares)           0 0         0   0  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)           5,271,604 5,271,604         5,271,604   5,271,604  
Gain (Loss) on Issuance of Equity             $ 0   $ 0     $ 0 $ (14,840)    
Common Stock, Shares, Outstanding (in shares)           6,857,170 6,857,170         6,857,170   6,421,084  
Preferred Stock, Shares Outstanding (in shares)           0 0         0   0  
ATM Facility [Member]                              
Proceeds from Issuance or Sale of Equity             $ 2,100                
Stock Issued During Period, Shares, New Issues (in shares)             394,453 0   0 144,755 394,453      
Fixed Commission Rate Percentage           3.00%                  
Proceeds from Issuance of Common Stock             $ 2,100   0     $ 2,100 4,500    
Payments for Commissions             100   $ 0     100 100    
Canaccord [Member] | Underwriting Agreement [Member]                              
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 30       $ 30         $ 30 $ 30        
Unit Issued During Period, Units, New Issues (in shares) 2,500,000                            
Unit Issued, Price Per Unit (in dollars per share) $ 16       $ 16         $ 16 $ 16        
Each Unit, Number of Common Stock (in shares) 1       1         1 1        
Proceeds from Issuance or Sale of Equity         $ 40,000                    
Payment for Underwriting Fees and Commissions         2,400                    
Payments of Stock Issuance Costs         200                    
Gain (Loss) on Issuance of Equity         $ (14,800)                    
Lincoln Park Capital Fund, LLC [Member]                              
Stock Issued During Period, Shares, New Issues (in shares)   16,633                          
Purchase Agreement, Commencing Period (Month)     36 months                        
Purchase Agreement, Regular Purchase (in shares)   3,750                          
Purchase Agreement, Regular Purchase, Shares, Closing Price One (in shares)   5,000                          
Purchase Agreement, Closing Price One (in dollars per share)   $ 20                          
Purchase Agreement, Regular Purchase, Shares, Closing Price Two (in shares)   7,500                          
Purchase Agreement, Closing Price Two (in dollars per share)   $ 40                          
Purchase Agreement, Regular Purchase, Shares, Closing Price Three (in shares)   10,000                          
Purchase Agreement, Closing Price Three (in dollars per share)   $ 80                          
Purchase Agreement, Accelerated Purchase, Maximum Percentage of Regular Purchase     300.00%                        
Purchase Agreement, Accelerated Purchase, Maximum Percentage Of Prior Day Volume     30.00%                        
Purchase Agreement, Additional Accelerated Purchase, Maximum Percentage of Regular Purchase     300.00%                        
Purchase Agreement, Additional Accelerated Purchase, Maximum Percentage of Prior Day Volume     30.00%                        
Purchase Agreement, Price Discount of Additional Purchases     97.00%                        
Purchase Agreement, Additional Commitment Shares (in shares)   8,317                          
Purchase Agreement, Shares Sell Limitation (in shares)   765,506                          
Purchase Agreement, Shares Sell Limitation, Percentage Of Outstanding Shares     19.99%                        
Percentage of Common Stock Beneficial Ownership     4.99%                        
Derivative, Notional Amount           $ 0 $ 0         $ 0   $ 0  
Lincoln Park Capital Fund, LLC [Member] | Maximum [Member]                              
Purchase Agreement, Amount Of Shares Commit To Purchase     $ 25,000                        
Percentage of Common Stock Beneficial Ownership     9.99%                        
Lincoln Park Capital Fund, LLC [Member] | Minimum [Member]                              
Purchase Agreement, Minimum Average Price Per Share To Avoid Sell Limitation (in dollars per share)   $ 24.808                          
Lincoln Park [Member] | Purchase Agreement [Member]                              
Proceeds from Issuance or Sale of Equity                         $ 400    
Stock Issued During Period, Shares, New Issues (in shares)                         20,000    
Lincoln Park [Member] | Commitment Shares [Member] | Purchase Agreement [Member]                              
Stock Issued During Period, Shares, New Issues (in shares)                         145    
Warrants Originally Issued by Tottenham Acquisition I Limited [Member]                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)       120,375                      
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)       0.025                      
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)       $ 0.01                      
Class of Warrant or Right, Redemption, Threshold Stock Price Trigger (in dollars per share)       $ 330                      
Class of Warrant or Right, Redemption, Threshold Consecutive Trading Days (Day)       20 days                      
Class of Warrant or Right, Redemption, Threshold Trading Days (Day)       30 days                      
Class of Warrant or Right, Exercised During Period (in shares)                       0   0  
Chardan Unit Purchase Option [Member]                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)       1,229                      
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)       0.025                      
Class of Warrant or Right, Exercised During Period (in shares)                       0   0  
Avenue Warrants 2023 [Member] | Avenue [Member]                              
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)           $ 4.6014 $ 4.6014         $ 4.6014   $ 16  
New Avenue Warrant [Member]                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                           150,000  
Class of Warrant or Right, Exercised During Period (in shares)                       0   0  
New Avenue Warrant [Member] | Avenue [Member]                              
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)           $ 4.6014 $ 4.6014         $ 4.6014     $ 16
Tranche A Warrant [Member]                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)           2,500,000 2,500,000         2,500,000      
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)           1 1         1      
Class of Warrant or Right, Exercised During Period (in shares)                       0   0  
Tranche A Warrant [Member] | Canaccord [Member]                              
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) 1       1         1 1        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 22       $ 22         $ 22 $ 22        
Each Unit, Number of Warrant (in shares) 1       1         1 1        
Tranche B Warrant [Member]                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)           2,500,000 2,500,000         2,500,000      
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)           1 1         1      
Class of Warrant or Right, Exercised During Period (in shares)                       0   0  
Tranche B Warrant [Member] | Canaccord [Member]                              
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) 1       1         1 1        
Each Unit, Number of Warrant (in shares) 1       1         1 1