v3.25.2
Note 2 - Warrant Liability and Fair Value of Financial Instruments (Details Textual)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Jul. 07, 2023
USD ($)
$ / shares
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Jan. 29, 2024
USD ($)
shares
Dec. 31, 2023
$ / shares
Gain (Loss) on Derivative Instruments, Net, Pretax   $ (0) $ (4,556) $ (0) $ (4,556)    
Fair Value Adjustment of Warrants   0 3,444 (0) 3,444    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares             $ 0.02
The Warrant [Member] | Termination Agreement [Member]              
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares $ 0.02            
Class of Warrant or Right, Value of Securities Called by Warrants or Rights $ 8,000            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares           80,000  
Warrants and Rights Outstanding           $ 8,000  
Measurement Input, Probability Rate [Member] | Valuation, Probability-weighted Expected Return Method (PWERM) [Member] | Qualified Offering Occurring, One [Member]              
Warrants and Rights Outstanding, Measurement Input             0.70
Measurement Input, Probability Rate [Member] | Valuation, Probability-weighted Expected Return Method (PWERM) [Member] | Qualified Offering Occurring, Two [Member]              
Warrants and Rights Outstanding, Measurement Input 0.10 [1]           0.10
Measurement Input, Probability Rate [Member] | Valuation, Probability-weighted Expected Return Method (PWERM) [Member] | No Qualified Offering Occurring [Member]              
Warrants and Rights Outstanding, Measurement Input             0.20
Fair Value, Inputs, Level 3 [Member]              
Assets, Fair Value Disclosure   0 0 0 0    
Liabilities, Fair Value Disclosure   $ 0 $ 0 $ 0 $ 0    
[1] Scenario probability as of issuance was based on timing expectations of management that a qualified offering occurring as of December 31, 2023 was estimated at 70%, respectively; a qualified offering occurring as of June 30, 2024 was estimated at 10%; and no qualified offering occurring was estimated at 20%;