Quarterly report pursuant to Section 13 or 15(d)

Note 7 - Employee and Director Benefits - Summary of Stock Option Activity (Details)

v3.21.2
Note 7 - Employee and Director Benefits - Summary of Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Granted (in shares)   0    
Share-based Payment Arrangement, Option [Member]        
Outstanding, shares (in shares) 640,950 965,248 965,248  
Outstanding, weighted average exercise price (in dollars per share) $ 18.14 $ 15.19 $ 15.19  
Outstanding, weighted average remaining contractual term (Year) 4 years 1 month 6 days 4 years 6 months 4 years 7 months 6 days 4 years 10 months 24 days
Outstanding, aggregate intrinsic value $ 22,438 $ 11,720 $ 16,981 $ 21,911
Granted (in shares) 500 0    
Granted, weighted average exercise price (in dollars per share) $ 32.60 $ 0    
Granted, weighted average remaining contractual term (Year) 7 years 8 months 12 days      
Granted, aggregate intrinsic value $ 23 $ 0    
Exercised (in shares) (257,200) (279,300)    
Exercised, weighted average exercise price (in dollars per share) $ 12.46 $ 11.36    
Exercised, weighted average remaining contractual term (Year) 3 years 2 months 12 days 3 years 2 months 12 days    
Exercised, aggregate intrinsic value $ 16,805 $ 6,330    
Forfeited (in shares) (9,000) (18,000)    
Forfeited, weighted average exercise price (in dollars per share) $ 16.57 $ 30.79    
Forfeited, weighted average remaining contractual term (Year) 2 years 1 month 6 days 6 years 4 months 24 days    
Forfeited, aggregate intrinsic value $ 256 $ 58    
Exercisable, shares (in shares) 281,000 209,200    
Exercisable, weighted average exercise price (in dollars per share) $ 12.79 $ 12.41    
Exercisable, weighted average remaining contractual term (Year) 3 years 3 years 2 months 12 days    
Exercisable, aggregate intrinsic value $ 18,565 $ 4,425    
Outstanding, shares (in shares) 375,250 667,948 640,950 965,248
Outstanding, weighted average exercise price (in dollars per share) $ 19.56 $ 16.37 $ 18.14 $ 15.19