Quarterly report pursuant to Section 13 or 15(d)

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

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Note 5 - Stock Incentive Plan - Option Activity (Details) - $ / shares
 9 Months Ended
Sep. 30, 2024
Jun. 30, 2024
Jan. 01, 2024
Balances (in shares) 428,915   421,820
Balances, 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) [1] 43,523    
Granted, exercise price (in dollars per share) [1] $ 3.42    
Forfeited(2) (in shares) [2] (19,628)    
Forfeited, exercise price (in dollars per share) [2] $ 15.88    
Exercised, options (in shares) (16,800)    
Exercised, exercise price (in dollars per share) $ 0.005    
Unvested options outstanding expected to vest(3) (in shares) [3]   104,425  
Unvested options outstanding expected to vest(3), exercise price (in dollars per share) [3]   $ 11.38  
[1] 78,592 options vest as follows: options to purchase 10,000 shares of the Company’s common stock vest monthly over one year; options to purchase 68,592 shares of the Company's common stock vest 6/48ths on the six-month anniversary of vesting commencement date and 1/48th per month thereafter.
[2] There were no forfeitures during the six months ended June 30, 2024.
[3] Forfeitures only include known forfeitures to-date as the Company accounts for forfeitures as they occur due to a limited history of forfeitures.