Annual report pursuant to Section 13 and 15(d)

Equity Incentive Plan - Summary of Stock Option Activity and Related Information (Details)

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Equity Incentive Plan - Summary of Stock Option Activity and Related Information (Details) - Equity Incentive Plan - $ / shares
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Stock Options      
Outstanding at January 1 492,886 391,650  
Number of stock options granted 61,062 131,821  
Exercised (in shares) (3,750) (27,934)  
Forfeited / Expired (36,250) (2,651)  
Outstanding at December 31, 2022 513,948 492,886 391,650
Exercisable at December 31, 2022 443,284 378,470  
Weighted Average Exercise Price      
Outstanding at January 1 (in dollars per share) $ 7.35 $ 5.70  
Granted 11.09 11.42  
Exercised (in dollars per share) 5.36 3.27  
Forfeited/Expired (in dollars per share) 10.45 8.04  
Outstanding at December 31, 2022 (in dollars per share) 7.59 7.35 $ 5.70
Exercisable at December 31, 2022 (in dollars per share) $ 6.78 $ 6.17  
Weighted Average Remaining Life (in years)      
Outstanding at December 31, 2022 6 years 7 months 6 days 7 years 7 months 6 days 8 years 1 month 6 days
Exercisable at December 31, 2022 6 years 2 months 12 days 7 years 1 month 6 days