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) - 2013 Equity Incentive Plan [Member] - $ / shares
3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Stock Options    
Outstanding at December 31, 2020 391,650  
Granted 56,821  
Exercised (in shares) (17,534)  
Outstanding at March 31, 2021 430,937 391,650
Exercisable at March 31, 2021 355,739  
Weighted Average Exercise Price    
Outstanding at December 31, 2020 (in dollars per share) $ 5.70  
Granted 12.09  
Exercised (in dollars per share) 3.79  
Outstanding at March 31, 2021 6.62 $ 5.70
Exercisable at March 31, 2021 $ 6.05  
Weighted Average Remaining Life (in years)    
Outstanding at December 31 8 years 8 years 1 month 6 days
Exercisable at March 31, 2021 7 years 8 months 12 days