Annual report pursuant to Section 13 and 15(d)

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, 2023
Dec. 31, 2022
Jan. 01, 2022
Balances (in shares) 2,109,001 1,642,950 1,543,989
Balances, exercise price (in dollars per share) $ 4.01 $ 4.28 $ 4.78
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) 508,902 604,064 [1]  
Granted, exercise price (in dollars per share) $ 3.14 $ 2.83 [1]  
Forfeited (in shares) (42,851) (337,103) [2]  
Forfeited, exercise price (in dollars per share) $ 3.93 $ 6.13 [2]  
Exercised, options (in shares) 0 (168,000)  
Exercised, exercise price (in dollars per share) $ 0 $ 0.001  
Unvested options outstanding expected to vest(3) (in shares) [3] 601,746    
Unvested options outstanding expected to vest(3), exercise price (in dollars per share) [3] $ 3.37    
[1] 604,064 options vest as follows: options to purchase 533,552 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; options to purchase 60,512 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. Exercise prices range from $1.59 to $3.95 per share.
[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.