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The following table sets forth information with respect to nonvested options for 2023: (Details) - $ / shares
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Equity:      
Nonvested options - beginning of year 168,730    
Weighted average grant date fair value, beginning of year $ 16.31    
Nonvested options granted 47,500 62,000 9,000
Weighted average grant date fair value, granted $ 35.08    
Nonvested options vested or forfeited (94,130)    
Weighted average grant date fair value, vested or forfeited $ 15.19    
Nonvested options - end of year 122,100 168,730  
Weighted average grant date fair value, end of year $ 24.47 $ 16.31