v3.26.1
Note 3 - Fair Value of Financial Instruments - Valuation Measurements (Details)
Mar. 31, 2026
Dec. 31, 2025
yr
Dec. 31, 2024
yr
Measurement Input, Calibration Discount [Member] | Senior Secured Note [Member]      
Significant Unobservable Inputs 0.615 0.615  
Measurement Input, Risk Free Interest Rate [Member] | Warrant Liability [Member]      
Significant Unobservable Inputs 3.65 0.0365  
Minimum [Member] | Embedded Derivative Financial Instruments [Member]      
Successful financing/IPO   27.60% 27.60%
Maturity   0.00% 16.00%
Qualified Financing   0.00% 0.00%
Change of Control   0.00% 0.00%
Minimum [Member] | Measurement Input, Discount Rate [Member] | Embedded Derivative Financial Instruments [Member]      
Significant Unobservable Inputs   0.187 0.187
Minimum [Member] | Measurement Input, Discount Rate [Member] | Senior Secured Note [Member]      
Significant Unobservable Inputs 0.25 0.25  
Minimum [Member] | Measurement Input, Expected Term [Member] | Embedded Derivative Financial Instruments [Member]      
Significant Unobservable Inputs   0.1 0.3
Minimum [Member] | Measurement Input, Expected Term [Member] | Senior Secured Note [Member]      
Significant Unobservable Inputs 2.74 2.99  
Minimum [Member] | Measurement Input, Expected Term [Member] | Warrant Liability [Member]      
Significant Unobservable Inputs 4.74 4.99  
Minimum [Member] | Measurement Input, No Exercise Window [Member] | Warrant Liability [Member]      
Significant Unobservable Inputs 0.19 0.19  
Minimum [Member] | Measurement Input, Price Volatility [Member] | Warrant Liability [Member]      
Significant Unobservable Inputs 0.824 0.824  
Maximum [Member] | Embedded Derivative Financial Instruments [Member]      
Successful financing/IPO   98.00% 63.90%
Maturity   20.00% 65.50%
Qualified Financing   3.40% 3.40%
Change of Control   3.40% 3.40%
Maximum [Member] | Measurement Input, Discount Rate [Member] | Embedded Derivative Financial Instruments [Member]      
Significant Unobservable Inputs   0.25 0.25
Maximum [Member] | Measurement Input, Discount Rate [Member] | Senior Secured Note [Member]      
Significant Unobservable Inputs 0.264 0.251  
Maximum [Member] | Measurement Input, Expected Term [Member] | Embedded Derivative Financial Instruments [Member]      
Significant Unobservable Inputs   0.6 0.9
Maximum [Member] | Measurement Input, Expected Term [Member] | Senior Secured Note [Member]      
Significant Unobservable Inputs 3 3  
Maximum [Member] | Measurement Input, Expected Term [Member] | Warrant Liability [Member]      
Significant Unobservable Inputs 5 5  
Maximum [Member] | Measurement Input, No Exercise Window [Member] | Warrant Liability [Member]      
Significant Unobservable Inputs 0.21 0.21  
Maximum [Member] | Measurement Input, Price Volatility [Member] | Warrant Liability [Member]      
Significant Unobservable Inputs 0.90 0.825