v3.26.1
Note 5 - Stockholders' Equity (Deficit), Equity Incentive Plans, And Stock-Based Compensation - Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2024
Dec. 31, 2023
Balance, number of options outstanding (in shares) 569,098    
Share-Based Payment Arrangement, Option [Member]      
Balance, number of options outstanding (in shares)   158,098  
Balance, weighted average exercise price (in dollars per share)   $ 68.8  
Balance, weighted average remaining contractual term (Year)   9 years 4 months 28 days 8 years 2 months 19 days
Balance, aggregate intrinsic value   $ 0 $ 0
Granted, number of options outstanding (in shares) 411,000    
Granted, weighted average exercise price (in dollars per share) $ 1.87    
Balance, number of options outstanding (in shares)   569,098 158,098
Balance, weighted average exercise price (in dollars per share)   $ 20.46 $ 68.8
Options vested and exercisable, number of options outstanding (in shares) 257,321    
Options vested and exercisable, weighted average exercise price (in dollars per share) $ 39.09    
Options vested and exercisable, weighted average remaining contractual term (Year) 8 years 10 months 20 days    
Options vested and exercisable, aggregate intrinsic value $ 0