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
 6 Months Ended
Jun. 30, 2023
Balances (in shares) 1,642,950
Balances, exercise price (in dollars per share) $ 4.28
Granted(1) (in shares) [1] 508,902
Granted, exercise price (in dollars per share) [1] $ 3.14
Forfeited(2) (in shares) [2] (37,851)
Forfeited, exercise price (in dollars per share) [2] $ 4.10
Balances (in shares) 2,114,001
Balances, exercise price (in dollars per share) $ 4.01
Unvested options outstanding expected to vest(3) (in shares) [3] 768,496
Unvested options outstanding expected to vest(3), exercise price (in dollars per share) [3] $ 3.44
[1] 508,902 options vest as follows: options to purchase 443,182 shares of the Company’s common stock vest 6/48ths on the six-month anniversary of grant date and 1/48th per month thereafter; options to purchase 55,720 shares of the Company’s common stock vest quarterly over one year; and options to purchase 10,000 shares of the Company’s common stock vest monthly over one year.
[2] Forfeited options represent unvested shares and vested, unexercised shares related to employee terminations.
[3] Forfeitures only include known forfeitures to-date as the Company accounts for forfeitures as they occur due to a limited history of forfeitures.