Note 7 - Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	2024
Expected life of stock options (in years)		6.2
Risk free interest rate		3.98	%
Annualized Volatility		32.3	%
Dividend yields		3.17	%
Weighted-average fair value of options granted during the three months ended March 31, 2024	$	9.25

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term in Years		Intrinsic Value
Options outstanding at January 1, 2023		189,917		$	21.14
Options exercised		(24,400	)		18.59
Options outstanding at December 31, 2023		165,517		$	21.52
Options exercised		(23,765	)		15.06
Options outstanding at March 31, 2024		141,752		$	22.60		3.0	$	2,011,461
Options exercisable at March 31, 2024		141,752		$	22.60		3.0	$	2,011,461

	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term in Years		Intrinsic Value
Options outstanding at January 1, 2023		117,200		$	31.00
Options cancelled		(10,400	)		31.00
Options exercised		(1,300	)		31.00
Options outstanding at December 31, 2023		105,500		$	31.00
Options granted		107,200			34.07
Options exercised		(1,300	)		31.00
Options outstanding at March 31, 2024		211,400		$	32.56		8.96	$	894,902
Options exercisable at March 31, 2024		21,800		$	31.00		7.93	$	126,222
Expected to vest after March 31, 2024		163,397		$	32.56		9.08	$	691,696