v3.26.1
Note 11 - Equity (Details Textual)
 1 Months Ended 3 Months Ended 5 Months Ended 6 Months Ended 12 Months Ended
Jun. 04, 2026
USD ($)
$ / shares
shares
May 31, 2026
USD ($)
shares
Sep. 30, 2025
USD ($)
shares
Mar. 20, 2025
USD ($)
$ / shares
shares
Jan. 29, 2025
USD ($)
shares
Jan. 27, 2025
$ / shares
shares
Jan. 20, 2025
USD ($)
Aug. 14, 2024
USD ($)
shares
May 23, 2024
USD ($)
shares
Apr. 19, 2024
USD ($)
shares
Mar. 05, 2024
USD ($)
shares
Feb. 28, 2024
USD ($)
shares
Feb. 07, 2024
USD ($)
shares
Mar. 31, 2024
shares
Aug. 31, 2023
USD ($)
shares
Jun. 30, 2026
USD ($)
$ / shares
shares
Mar. 31, 2026
USD ($)
shares
Jun. 30, 2025
USD ($)
Mar. 31, 2025
USD ($)
shares
Mar. 31, 2024
shares
Jul. 29, 2024
$ / shares
shares
Jun. 30, 2026
USD ($)
$ / shares
shares
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
$ / shares
shares
Dec. 31, 2024
USD ($)
shares
Apr. 17, 2025
USD ($)
Jan. 28, 2025
USD ($)
$ / shares
shares
Oct. 10, 2024
USD ($)
$ / shares
shares
Aug. 12, 2024
USD ($)
Aug. 14, 2023
USD ($)
May 24, 2021
$ / shares
shares
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares                               $ 0.001           $ 0.001                  
Preferred Stock, Shares Authorized (in shares) | shares                               50,000,000           50,000,000                  
Common Stock, Shares Authorized (in shares) | shares                               500,000,000           500,000,000   500,000,000              
Stock Issued During Period, Shares, Issued for Services (in shares) | shares   218,161                                                          
Stock Issued During Period, Value, Issued for Services   $ 1,000,000                           $ 972,000   $ 150,000                          
Warrants and Rights Outstanding                               18,600,000           $ 18,600,000                  
Gain (Loss) on Issuance of Common Stock                               (0)   (0)       (0) $ (729,000)                
Gain (Loss) on Consideration Shares and Warrants                               (0)   (0)       (0) (1,277,000)                
Gain (Loss) on Convertible Debt Redemption                               $ (0)   (1,874,000)       $ (0) (3,467,000)                
Class of Warrant or Right, Outstanding (in shares) | shares                               8,986,823 9,359,710         8,986,823   9,359,710 7,173,766            
Class of Warrant or Right, Exercised During Period (in shares) | shares                               14,375 (0)             1,870,962              
Fair Value Adjustment of Warrants                               $ 9,784,000   6,414,000       $ 6,246,000 3,518,000                
Adjustments to Additional Paid in Capital, Warrant Issued                                     $ 3,255,000                        
Anson, Third Tranche Notes [Member]                                                              
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares                                                     $ 3.78        
Anson Convertible Notes [Member]                                                              
Long-Term Debt, Gross                               0           0   $ 0         $ 15,000,000    
Anson Second Tranche Notes [Member]                                                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares                                                       1,846,128      
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares                                               $ 1.65       $ 1.7664      
Conversion of Principal and Interest Into Common Stock [Member] | Anson, Third Tranche Notes [Member]                                                              
Debt Conversion, Original Debt, Amount             $ 100,000                                 $ 5,500,000              
Debt Conversion, Converted Instrument, Shares Issued (in shares) | shares       5,463                             5,463                        
Stock Issued During Period, Value, Conversion of Convertible Securities                                               18,900,000              
Conversion of Principal and Interest Into Common Stock [Member] | Anson Convertible Notes [Member]                                                              
Debt Conversion, Original Debt, Amount                                               $ 1,300,000 $ 4,200,000            
Debt Conversion, Converted Instrument, Shares Issued (in shares) | shares                                               7,300,000              
Stock Issued During Period, Value, Conversion of Convertible Securities                                               $ 18,900,000              
Gain (Loss) on Convertible Debt Redemption                                               (6,200,000)              
Conversion of Principal and Interest Into Common Stock [Member] | Anson Second Tranche Notes [Member]                                                              
Debt Conversion, Original Debt, Amount                                               $ 5,800,000              
RD Purchase Agreement [Member]                                                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares         1,215,278 1,215,278                                                  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares       $ 2.3   $ 2.88                                                  
Proceeds from Issuance or Sale of Equity         $ 3,300,000                                                    
Class of Warrant of Right, Grant Date Fair Value         $ 4,000,000                                                    
RD Purchase Agreement [Member] | Measurement Input, Share Price [Member]                                                              
Warrants and Rights Outstanding, Measurement Input         2.07                                                    
RD Purchase Agreement [Member] | Measurement Input, Exercise Price [Member]                                                              
Warrants and Rights Outstanding, Measurement Input         2.88                                                    
RD Purchase Agreement [Member] | Measurement Input, Expected Term [Member]                                                              
Warrants and Rights Outstanding, Measurement Input         5                                                    
RD Purchase Agreement [Member] | Measurement Input, Price Volatility [Member]                                                              
Warrants and Rights Outstanding, Measurement Input         1.158                                                    
RD Purchase Agreement [Member] | Measurement Input, Risk Free Interest Rate [Member]                                                              
Warrants and Rights Outstanding, Measurement Input         0.04                                                    
RD Purchase Agreement [Member] | Estimate of Fair Value Measurement [Member]                                                              
Warrants and Rights Outstanding         $ 4,000,000                                                    
Consideration Warrants [Member]                                                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares       303,819                                                      
Warrants and Rights Outstanding       $ 600,000                                                      
Class of Warrant or Right Issued in Period (in shares) | shares       303,819                                                      
Consideration Warrants [Member] | Measurement Input, Share Price [Member]                                                              
Warrants and Rights Outstanding, Measurement Input       2.07                                                      
Consideration Warrants [Member] | Measurement Input, Exercise Price [Member]                                                              
Warrants and Rights Outstanding, Measurement Input       2.88                                                      
Consideration Warrants [Member] | Measurement Input, Expected Term [Member]                                                              
Warrants and Rights Outstanding, Measurement Input       5                                                      
Consideration Warrants [Member] | Measurement Input, Price Volatility [Member]                                                              
Warrants and Rights Outstanding, Measurement Input       1.158                                                      
Consideration Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member]                                                              
Warrants and Rights Outstanding, Measurement Input       0.04                                                      
Substitute Warrants [Member] | Neuro Rx [Member]                                                              
Foreign Currency Exchange Rate, Remeasurement                                                             0.316
Class of Warrant or Right, Outstanding (in shares) | shares                                                             3,792,970
Public Warrants [Member]                                                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares                                                             345,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares                                                             $ 115
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) | shares                                                             0.1
Class of Warrant or Right, Exercised During Period (in shares) | shares                                               0 0            
Private Placement Warrants [Member]                                                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares                                               13,625              
Fair Value Adjustment of Warrants                               10,000.00           10,000.00                  
February Warrants [Member]                                                              
Adjustments to Additional Paid in Capital, Warrant Issued                       $ 500,000                                      
February Warrants [Member] | Measurement Input, Share Price [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                       3.59                                      
February Warrants [Member] | Measurement Input, Exercise Price [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                       3.8                                      
February Warrants [Member] | Measurement Input, Expected Term [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                       5                                      
February Warrants [Member] | Measurement Input, Price Volatility [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                       1.781                                      
February Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                       0.0426                                      
February Warrants [Member] | Measurement Input, Expected Dividend Rate [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                       0                                      
February Underwriter Warrants [Member]                                                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares 12,500                     25,000                                      
Adjustments to Additional Paid in Capital, Warrant Issued                       $ 100,000                                      
Warrants and Rights Outstanding, Term (Year)                       5 years                                      
Stock issued During Period, Shares, Warrant Exercises (in shares) | shares 2,742                                                            
February Underwriter Warrants [Member] | Measurement Input, Share Price [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                       3.05                                      
February Underwriter Warrants [Member] | Measurement Input, Exercise Price [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                       3.3                                      
February Underwriter Warrants [Member] | Measurement Input, Expected Term [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                       5                                      
February Underwriter Warrants [Member] | Measurement Input, Price Volatility [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                       1.781                                      
February Underwriter Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                       0.0426                                      
February Underwriter Warrants [Member] | Measurement Input, Expected Dividend Rate [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                       0                                      
Underwriter Overallotment Warrants [Member]                                                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares 1,875                   3,750                                        
Adjustments to Additional Paid in Capital, Warrant Issued                     $ 100,000                                        
Stock issued During Period, Shares, Warrant Exercises (in shares) | shares 594                                                            
Underwriter Overallotment Warrants [Member] | Measurement Input, Share Price [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                 3.62 3.04 3.05                                        
Underwriter Overallotment Warrants [Member] | Measurement Input, Exercise Price [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                 3.63 3.63 3.3                                        
Underwriter Overallotment Warrants [Member] | Measurement Input, Expected Term [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                 5 5 5                                        
Underwriter Overallotment Warrants [Member] | Measurement Input, Price Volatility [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                 1.781 1.781 1.781                                        
Underwriter Overallotment Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                 0.0452 0.0466 0.0412                                        
Underwriter Overallotment Warrants [Member] | Measurement Input, Expected Dividend Rate [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                 0 0 0                                        
April Underwriter Warrants [Member]                                                              
Adjustments to Additional Paid in Capital, Warrant Issued                   $ 100,000                                          
April Underwriter Overallotment Warrants [Member]                                                              
Adjustments to Additional Paid in Capital, Warrant Issued                 $ 100,000                                            
Alvogen and Lotus Warrants [Member]                                                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares                         419,598                                    
Adjustments to Additional Paid in Capital, Warrant Issued                         $ 1,300,000                                    
Alvogen and Lotus Warrants [Member] | Measurement Input, Share Price [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                         4.1                                    
Alvogen and Lotus Warrants [Member] | Measurement Input, Exercise Price [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                         4                                    
Alvogen and Lotus Warrants [Member] | Measurement Input, Expected Term [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                         3                                    
Alvogen and Lotus Warrants [Member] | Measurement Input, Price Volatility [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                         1.38                                    
Alvogen and Lotus Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                         0.042                                    
Alvogen and Lotus Warrants [Member] | Measurement Input, Expected Dividend Rate [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                         0                                    
Anson Warrants Tranche One [Member]                                                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares               1,349,305                                              
Adjustments to Additional Paid in Capital, Warrant Issued               $ 2,100,000                                              
Warrants and Rights Outstanding, Term (Year)               5 years                                              
Anson Warrants Tranche One [Member] | Measurement Input, Share Price [Member]                                                              
Warrants and Rights Outstanding, Measurement Input               1.86                                              
Anson Warrants Tranche One [Member] | Measurement Input, Exercise Price [Member]                                                              
Warrants and Rights Outstanding, Measurement Input               2.42                                              
Anson Warrants Tranche One [Member] | Measurement Input, Expected Term [Member]                                                              
Warrants and Rights Outstanding, Measurement Input               5                                              
Anson Warrants Tranche One [Member] | Measurement Input, Price Volatility [Member]                                                              
Warrants and Rights Outstanding, Measurement Input               1.22                                              
Anson Warrants Tranche One [Member] | Measurement Input, Risk Free Interest Rate [Member]                                                              
Warrants and Rights Outstanding, Measurement Input               0.0367                                              
Anson Warrants Tranche One [Member] | Measurement Input, Expected Dividend Rate [Member]                                                              
Warrants and Rights Outstanding, Measurement Input               0                                              
Anson Warrants Tranche Two [Member]                                                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares                                                       1,846,128      
Warrants and Rights Outstanding, Term (Year)                                                       5 years      
Anson Warrants Tranche Two [Member] | Measurement Input, Share Price [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                                                       1.38      
Anson Warrants Tranche Two [Member] | Measurement Input, Exercise Price [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                                                       1.76      
Anson Warrants Tranche Two [Member] | Measurement Input, Expected Term [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                                                       5      
Anson Warrants Tranche Two [Member] | Measurement Input, Price Volatility [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                                                       105      
Anson Warrants Tranche Two [Member] | Measurement Input, Risk Free Interest Rate [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                                                       3.91      
Anson Warrants Tranche Two [Member] | Measurement Input, Expected Dividend Rate [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                                                       0      
Anson Warrants Tranche Two [Member] | Estimate of Fair Value Measurement [Member]                                                              
Warrants and Rights Outstanding                                                       $ 1,900,000      
Anson Warrants, Tranche Three [Member]                                                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares                                                     862,699        
Anson Warrants, Tranche Three [Member] | Measurement Input, Share Price [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                                                     3.55        
Anson Warrants, Tranche Three [Member] | Measurement Input, Exercise Price [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                                                     3.78        
Anson Warrants, Tranche Three [Member] | Measurement Input, Expected Term [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                                                     5        
Anson Warrants, Tranche Three [Member] | Measurement Input, Price Volatility [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                                                     1.13        
Anson Warrants, Tranche Three [Member] | Measurement Input, Risk Free Interest Rate [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                                                     0.0433        
Anson Warrants, Tranche Three [Member] | Measurement Input, Expected Dividend Rate [Member]                                                              
Warrants and Rights Outstanding, Measurement Input                                                     0        
Anson Warrants, Tranche Three [Member] | Estimate of Fair Value Measurement [Member]                                                              
Warrants and Rights Outstanding                                                     $ 2,500,000        
Anson Warrants [Member]                                                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares               1,349,305                                              
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares                                               $ 1,870,960              
Class of Warrant or Right, Increase (Decrease) in Number of Securities Called by Warrants or Rights (in shares) | shares     1,870,960                                                        
Proceeds from Warrant Exercises     $ 3,090,000.00                                                        
Amended Anson Warrants [Member]                                                              
Class of Warrant or Right, Exercised During Period (in shares) | shares     1,870,960                                                        
Proceeds from Warrant Exercises     $ 3,100,000                                                        
Warrants Exercised, Noncash     5,400,000                                                        
Gain (Loss) on Exercise of Warrants     $ 5,400,000                                                        
Maximum [Member] | Conversion of Principal and Interest Into Common Stock [Member] | Anson, Third Tranche Notes [Member]                                                              
Debt Conversion, Original Debt, Amount                                     $ 100,000                        
Gain (Loss) on Convertible Debt Redemption                                     $ (100,000)                        
ATM Offering [Member]                                                              
Stock Issued During Period, Shares, New Issues (in shares) | shares                                         385,515                    
Stock Issued During Period, Value, New Issues                               8,404,000 $ 3,424,000 1,012,000                          
Equity Offering, Maximum Offering Amount                                                   $ 20,000,000       $ 4,900,000  
Proceeds from Issuance of Common Stock                               8,400,000   $ 1,000,000       11,828,000 1,012,000                
ATM Offering [Member] | Minimum [Member]                                                              
Shares Issued, Price Per Share (in dollars per share) | $ / shares                                         $ 2.42                    
ATM Offering [Member] | Maximum [Member]                                                              
Shares Issued, Price Per Share (in dollars per share) | $ / shares                                         $ 7.1                    
Underwritten Public Offering [Member]                                                              
Stock Issued During Period, Shares, New Issues (in shares) | shares 6,378,942                                                            
Stock Issued During Period, Value, New Issues                               $ 20,716,000                              
Shares Issued, Price Per Share (in dollars per share) | $ / shares $ 3.5                                                            
Proceeds from Issuance of Common Stock $ 20,700,000                                         $ 20,716,000 0                
RD Purchase Agreement [Member]                                                              
Stock Issued During Period, Shares, New Issues (in shares) | shares           1,215,278                                                  
Shares Issued, Price Per Share (in dollars per share) | $ / shares           $ 2.88                                                  
Proceeds from Issuance or Sale of Equity         $ 3,300,000                                                    
Gain (Loss) on Issuance of Common Stock                                             700,000 $ (700,000)              
Consent and Waiver Agreement [Member]                                                              
Stock Issued During Period, Shares, New Issues (in shares) | shares       303,819                                                      
Stock Issued During Period, Value, New Issues       $ 600,000                                                      
Gain (Loss) on Consideration Shares and Warrants                                             $ (1,280,000)                
Private Placement [Member]                                                              
Stock Issued During Period, Shares, New Issues (in shares) | shares                       270,000                                      
Private Placement [Member] | February Warrants [Member]                                                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares                       270,000                                      
April 2024 Offering [Member] | April Underwriter Warrants [Member]                                                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares                 4,553 30,350                                          
Warrants and Rights Outstanding, Term (Year)                   5 years                                          
Conversion of Series A Preferred Stock to Common Stock [Member]                                                              
Conversion of Stock, Shares Converted (in shares) | shares                                       3,000,000                      
Conversion of Stock, Shares Issued (in shares) | shares                           300,000                                  
Series A Preferred Stock [Member]                                                              
Preferred Stock, Shares Authorized (in shares) | shares                               12,000,000           12,000,000                  
Stock Issued During Period, Shares, New Issues (in shares) | shares                             3                                
Stock Issued During Period, Value, New Issues                             $ 1,200,000                                
Preferred Stock, Shares Issued (in shares) | shares                               0           0   0              
Preferred Stock, Shares Outstanding (in shares) | shares                               0           0   0