Quarterly report pursuant to Section 13 or 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) - $ / shares
3 Months Ended 12 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Stock Options    
Forfeited / Expired (16,250)  
Weighted Average Exercise Price    
Forfeited/Expired (in dollars per share) $ 9.33  
2013 Equity Incentive Plan    
Stock Options    
Outstanding at December 31, 2021 492,886  
Granted 23,096  
Exercised (in shares) (3,750)  
Outstanding at March 31, 2022 495,982 492,886
Exercisable at March 31, 2022 386,828  
Weighted Average Exercise Price    
Outstanding at December 31, 2021 (in dollars per share) $ 7.35  
Granted 11.11  
Exercised (in dollars per share) 5.36  
Outstanding at March 31, 2022 (in dollars per share) 7.48 $ 7.35
Exercisable at March 31, 2022 (in dollars per share) $ 6.46  
Weighted Average Remaining Life (in years)    
Outstanding at March 31 7 years 2 months 12 days 7 years 7 months 6 days
Exercisable at March 31, 2022 6 years 7 months 6 days