v3.26.1
Note 10 - Equity Incentive Plans - Summary of Stock Option Transactions (Details) - $ / shares
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Shares available for grant, balance (in shares) 10,875,110  
Number of options outstanding, beginning balance (in shares) 25,407,299  
Weighted average exercise price, balance (in dollars per share) $ 1.96  
Shares available for grant, granted (in shares) (8,226,220)  
Number of options outstanding, granted (in shares) 5,438,040  
Weighted average exercise price, granted (in dollars per share) $ 0.68  
Number of options outstanding, exercised (in shares) (111,891) (3,625)
Weighted average exercise price, exercised (in dollars per share) $ 0.51  
Shares available for grant, forfeited (in shares) 839,948  
Number of options outstanding, forfeited (in shares) (479,584)  
Weighted average exercise price, forfeited (in dollars per share) $ 0.86  
Shares available for grant, canceled (in shares) 3,604,116  
Number of options outstanding, canceled (in shares) (3,614,052)  
Weighted average exercise price, canceled (in dollars per share) $ 3.49  
Shares available for grant, balance (in shares) 7,092,954  
Number of options outstanding, balance (in shares) 26,639,812  
Weighted average exercise price, balance (in dollars per share) $ 1.52  
Restricted Stock Units (RSUs) [Member]    
Number of RSUs outstanding (in shares) 5,733,306  
Balance, Weighted average grant date fair value (in dollars per share) $ 0.7  
Number of RSUs outstanding, granted (in shares) 2,788,180  
Granted, Weighted average grant date fair value (in dollars per share) $ 0.68  
Number of RSUs outstanding, release (in shares) (1,596,401)  
Released, Weighted average grant date fair value (in dollars per share) $ 0.79  
Number of RSUs outstanding, forfeite (in shares) (360,364)  
Forfeited, Weighted average grant date fair value (in dollars per share) $ 0.92  
Number of RSUs outstanding (in shares) 6,564,721  
Balance, Weighted average grant date fair value (in dollars per share) $ 0.66