Annual report [Section 13 and 15(d), not S-K Item 405]

Note 5 - Stock Incentive Plan - Option Activity (Details)

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Note 5 - Stock Incentive Plan - Option Activity (Details) - $ / shares
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Balance (in shares) 428,915 421,820
Balance, exercise price (in dollars per share) $ 19.35 $ 20.06
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) 303,073 [1] 43,523
Granted, exercise price (in dollars per share) $ 40.55 [1] $ 3.42
Forfeited (in shares) (47,851) [2],[3] (19,628)
Forfeited, exercise price (in dollars per share) $ 21.99 [2],[3] $ 15.88
Exercised (in shares) (67,582) (16,800)
Exercised, exercise price (in dollars per share) $ 8.36 $ 0.005
Balance (in shares) 616,555 428,915
Balance, exercise price (in dollars per share) $ 30.77 $ 19.35
Unvested options outstanding expected to vest(3) (in shares) [3] 205,226  
Unvested options outstanding expected to vest(3), exercise price (in dollars per share) [3] $ 41.57  
[1] 303,073 options vest as follows: options to purchase 8,270 shares of the Company’s common stock vest immediately upon the grant date; options to purchase 2,000 shares of the Company’s common stock vest monthly over one year; options to purchase 65,763 shares of the Company’s common stock vest quarterly over one year; options to purchase 227,040 shares of the Company’s common stock vest 6/48ths on the six-month anniversary of the vesting commencement date and 1/48th per month thereafter.
[2] Forfeited options represent unvested shares and vested, unexercised and expired shares related to employee terminations.
[3] Forfeitures only include known forfeitures to date as the Company accounts for forfeitures as they occur.