Note 13 - 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]

	March 31, 2024		December 31, 2023
Risk–free interest rate		4.33%		4.52%
Expected volatility		24.1%		29.3%
Expected life, in years		2.9		2.9
Expected dividend yield		2.64%		4.41%

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

	Number of Shares			Weighted Average Exercise Price		Aggregate Intrinsic Value
Options outstanding at January 1, 2023		445,144		$	66.62	$	–
Options granted		299,278			54.44		–
Options exercised		(103,481	)		64.72		–
Options cancelled		(52,407	)		60.58		–
Options outstanding at December 31, 2023		588,534			61.30		–
Options granted		245,726			94.07		–
Options exercised		(137,874	)		60.95		–
Options outstanding at March 31, 2024		696,386		$	72.93	$	15,025,015
Options exercisable at March 31, 2024		174,105		$	68.48	$	4,531,876

Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block]

Options Outstanding March 31, 2024	Exercise Prices			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life in Years
377,405	53.94	-	69.19		58.92		3.5
318,981	71.64	-	94.10		89.51		4.0
696,386					72.93		3.7