Quarterly report pursuant to Section 13 or 15(d)

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

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Note 7 - Employee and Director Benefits - Summary of Stock Option Activity (Details) - Share-Based Payment Arrangement, Option [Member] - USD ($)
$ / shares in Units, $ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Dec. 31, 2022
Outstanding, shares (in shares)   165,800 165,800 280,000
Outstanding, weighted average exercise price (in dollars per share)   $ 24.35 $ 24.35 $ 19.43
Outstanding, weighted average remaining contractual term (Year) 2 years 7 months 6 days 3 years 4 months 24 days 2 years 10 months 24 days 3 years
Outstanding, aggregate intrinsic value $ 5,507 $ 6,235 $ 7,211 $ 14,088
Exercised, shares (in shares) (23,050) (87,700)    
Exercised, weighted average exercise price (in dollars per share) $ 16.2 $ 12.04    
Exercised, weighted average remaining contractual term (Year) 8 months 12 days 1 year    
Exercised, aggregate intrinsic value $ 6,261 $ 2,533    
Outstanding, shares (in shares) 142,750 191,300   165,800
Outstanding, weighted average exercise price (in dollars per share) $ 25.67 $ 22.65   $ 24.35
Exercisable, shares (in shares) 127,250 137,800    
Exercisable, weighted average exercise price (in dollars per share) $ 23.54 $ 16.83    
Exercisable, weighted average remaining contractual term (Year) 2 years 1 year 10 months 24 days    
Exercisable, aggregate intrinsic value $ 5,014 $ 3,432    
Forfeited (in shares)   (1,000)    
Forfeited (in dollars per share)   $ 34.09    
Forfeited (Year)   5 years 7 months 6 days    
Forfeited   $ 7