v3.26.1
Note 8 - Stockholders' Equity (Details Textual)
 3 Months Ended 12 Months Ended
Dec. 31, 2025
USD ($)
$ / shares
shares
Dec. 13, 2025
USD ($)
$ / shares
shares
Jan. 02, 2025
shares
Mar. 31, 2026
USD ($)
$ / shares
shares
Sep. 30, 2025
shares
Mar. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
$ / shares
shares
Dec. 16, 2025
$ / shares
shares
Feb. 10, 2025
USD ($)
Jun. 30, 2024
USD ($)
Jun. 19, 2024
$ / shares
Jul. 25, 2023
$ / shares
shares
Jan. 18, 2023
shares
Common Stock, Shares Authorized (in shares)       300,000,000                  
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares $ 0.0001     $ 0.0001     $ 0.0001            
Preferred Stock, Shares Authorized (in shares) 2,000,000     2,000,000     2,000,000            
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares $ 0.0001     $ 0.0001     $ 0.0001            
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares       $ 2.54                  
Warrants and Rights Outstanding | $       $ 0                  
Underwriting Agreement 2025, Warrant [Member]                          
Number of Warrant, Per Unit   1                      
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) | $ / shares   $ 2.4   $ 2.4       $ 2.4          
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)               8,571,428          
Warrants and Rights Outstanding, Term (Year)               7 years          
Warrants and Rights Outstanding | $       $ 0                  
Warrants Issued With 2023 Promissory Notes [Member]                          
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares [1],[2]       $ 2                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)       6,250,000                 6,250,000
Warrants and Rights Outstanding, Term (Year)                         5 years
Warrants and Rights Outstanding | $ [1],[2]       $ 0                  
Class of Warrant or Right, Canceled in Period (in shares)         1,575,000                
The 2023 Warrants [Member]                          
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares                     $ 2    
Warrants and Rights Outstanding | $                   $ 3,675,000      
The 2023 Private Warrants [Member]                          
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares       $ 3.25 [3],[4]               $ 3.25  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                       2,850,000  
Warrants and Rights Outstanding, Term (Year)                       5 years  
Warrants and Rights Outstanding | $ [3],[4]       $ 0                  
ATD [Member]                          
Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares (in shares)     664,329                    
The 2025 At Market Issuance Sales Agreement [Member]                          
Equity Offering, Maximum Amount | $                 $ 25,000,000        
Stock Issued During Period, Shares, New Issues (in shares)             18,888,832            
Shares Issued, Price Per Share (in dollars per share) | $ / shares $ 1.23           $ 1.23            
Proceeds from Issuance of Common Stock | $       $ 0   $ 7,659,000 $ 22,350,000            
Underwriting Agreement 2025 [Member]                          
Units Issued During Period, Shares, New Issues (in shares)   8,571,428                      
Units Issued, Price Per Share (in dollars per share) | $ / shares   $ 1.75                      
Number of Share, Per Unit   1                      
Proceeds From Issuance or Sale of Equity, Gross | $   $ 15,000,000                      
Proceeds from Issuance or Sale of Equity | $ $ 13,900,000                        
[1] On January 18, 2023, in connection with the 2023 Promissory Notes, the Company issued the investors warrants to purchase 6,250,000 shares of its common stock, exercisable over a period of five years, at an exercise price of $2.00 per share. Of the original 6,250,000 warrants, 3,675,000 have been exercised and 1,575,000 were cancelled. The remaining warrants were exercisable commencing January 18, 2023 and expire on January 18, 2028.
[2] On January 18, 2023, in connection with the 2023 Promissory Notes, the Company issued the investors warrants to purchase 6,250,000 shares of its common stock, exercisable over a period of five years, at an exercise price of $2.00 per share. Of the original 6,250,000 warrants, 3,675,000 have been exercised and 1,575,000 were cancelled. The remaining warrants were exercisable commencing January 18, 2023 and expire on January 18, 2028. The 2023 Promissory Notes were redeemed in March 2024; the warrants remain outstanding in accordance with their original terms.
[3] On July 25, 2023, in connection with the 2023 Letter Agreement, the Company issued warrants to purchase 2,850,000 shares of its common stock, exercisable over a period of five and half years, at an exercise price of $3.25 per share. These warrants were exercisable commencing July 25, 2023 and expire on January 25, 2029.
[4] On July 25, 2023, in connection with the 2023 Letter Agreement, the Company issued warrants to purchase2,850,000 shares of its common stock, exercisable over a period of five and half years, at an exercise price of $3.25per share. These warrants were exercisable commencing July 25, 2023 and expire on January 25, 2029.