v3.25.1
Note 16 - Warrants (Details Textual)
$ / shares in Units, $ in Millions
 12 Months Ended
Jun. 14, 2024
USD ($)
$ / shares
shares
Jun. 08, 2023
USD ($)
$ / shares
shares
Jan. 06, 2023
Aug. 11, 2022
$ / shares
shares
Mar. 07, 2022
USD ($)
$ / shares
shares
Jun. 30, 2024
USD ($)
shares
Jun. 30, 2023
$ / shares
shares
Dec. 31, 2022
$ / shares
Oct. 25, 2022
$ / shares
Jan. 26, 2022
USD ($)
$ / shares
Proceeds from Warrant Exercises | $           $ 3.5        
Class of Warrant or Right, Issued During Period (in shares) [1]           1,806,434        
Class of Warrant or Right, Outstanding (in shares)           6,075,880 [2] 6,538,052 [3]      
Class of Warrant or Right, Exercised During Period (in shares)           2,247,648        
Reverse Stock Split [Member]                    
Stockholders' Equity Note, Stock Split, Conversion Ratio     20              
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, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares   $ 0.0001   $ 0.02            
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)   1                
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) | $ / shares   $ 3.18                
Warrants and Rights Outstanding, Term (Year)   5 years                
Class of Warrant or Right, Expiration, Period After Threshold is Met (Day)   30 days                
Class of Warrant or Right, Expiration, Threshold Percentage of Exercise Price   200.00%                
Class of Warrant or Right, Expiration, Threshold Consecutive Trading Days (Day)   40 days                
Tranche B Common Warrants [Member]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)   2,173,912                
Proceeds from Warrant Exercises | $ $ 3.5                  
Stock Issued During Period, Shares, Warrants Exercised (in shares) 367,478                  
Class of Warrant or Right, Exercised During Period (in shares)           1,806,434        
Common Warrants [Member]                    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares   $ 1.59                
Common Warrants Exchanged for PreFunded Warrants [Member]                    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares   $ 1.5899                
Securities Purchase Agreement Warrants [Member]                    
Warrants and Rights Outstanding | $   $ 5.0                
Payments of Stock Issuance Costs | $   $ 0.6                
Tranche B Pre-Funded Warrants [Member]                    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares $ 0.0001                  
Warrants and Rights Outstanding | $ $ 5.1                  
Class of Warrant or Right, Issued During Period (in shares) 1,806,434         1,806,434        
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) | $ / shares       $ 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, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares       $ 8.6     $ 2.32 $ 3.3    
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)       1            
Warrants and Rights Outstanding, Term (Year)       5 years            
Class of Warrant or Right, Adjustment Price, Number of Lowest Trading Days (Day)     5 years 5 days            
Class of Warrant or Right, Adjusted Price, Consecutive Trading Days (Day)     20 years 20 days            
Class of Warrant or Right, Adjusted Price, Period After Event (Day)       16 days            
August 2022 Common Warrants [Member] | Minimum [Member]                    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares       $ 2.32            
August 2022 Common Warrants [Member] | Maximum [Member]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)       2,325,581            
March 2022 Prefunded Warrants [Member]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)         151,500          
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares         $ 0.002          
March 2022 Common Warrants [Member]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)         333,300          
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares         $ 26          
March 2022 Common and Prefunded Warrants [Member]                    
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)         1.1          
Warrants and Rights Outstanding, Term (Year)         5 years          
Warrants and Rights Outstanding | $         $ 2.8          
Class of Warrant or Right, Exercisable Period (Month)         6 months          
Avenue Capital Warrants [Member]                    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares         $ 24.2       $ 8.6 $ 24.2
Warrants and Rights Outstanding | $                   $ 0.6
Liability Warrants [Member]                    
Class of Warrant or Right, Outstanding (in shares)           3,821,115 6,068,763      
Liability Pre-Funded Warrants [Member]                    
Class of Warrant or Right, Outstanding (in shares)           430,217 430,217      
Equity Warrants [Member]                    
Class of Warrant or Right, Outstanding (in shares)           18,114 39,072      
Liability Tranche B Prefunded Warrants [Member]                    
Class of Warrant or Right, Outstanding (in shares)           1,806,434        
Securities Purchase Agreement [Member]                    
Stock Issued During Period, Shares, New Issues (in shares)   1,743,695                
Proceeds from Issuance or Sale of Equity | $   $ 4.0                
Proceeds from Issuance or Sale of Equity, Net | $   $ 3.4                
The March 2022 Offering [Member]                    
Stock Issued During Period, Shares, New Issues (in shares)         151,500          
Proceeds from Issuance or Sale of Equity | $         $ 7.6          
Payments of Stock Issuance Costs | $         $ 0.8          
[1] The warrants issued during fiscal 2024 were a result of 1,806,434 Tranche B Warrants being exercise to 1,806,434 Tranche B Pre-Funded Warrants.
[2] The number of warrants outstanding as of June 30, 2024, is comprised of 3,821,115 liability classified warrants, 430,217 liability classified June 2023 Pre-Funded Warrants, 1,806,434 liability classified Tranche B Pre-Funded Warrants and 18,114 equity classified warrants.
[3] The number of warrants outstanding as of June 30, 2023, is comprised of 6,068,763 liability classified warrants, 430,217 liability classified June 2023 Pre-Funded Warrants and 39,072 equity classified warrants.