Note 15 - Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2024

Notes Tables

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

	Year Ended December 31,
	2024		2023		2022
Risk–free interest rate		4.40%		4.52%		1.83%
Expected volatility		24.1%		29.3%		31.4%
Expected life, in years		2.9		2.9		2.9
Expected dividend yield		2.63%		4.41%		3.57%

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

	Number of Shares			Weighted Average Exercise Price		Aggregate Intrinsic Value
Options outstanding at January 1, 2022		374,926		$	72.95		−
Options granted		302,266			64.72		−
Options exercised		(32,597	)		64.49		−
Options cancelled		(199,451	)		75.98		−
Options outstanding at December 31, 2022		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		297,783			94.42		−
Options exercised		(219,973	)		64.73		−
Options cancelled		(35,102	)		79.20		−
Options outstanding at December 31, 2024		631,242		$	74.73	$	20,720,547
Options exercisable at December 31, 2024		151,439		$	63.80	$	6,627,473

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

Options Outstanding December 31, 2024	Exercise Prices			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life in Years
328,137	$53.94	–	$69.19	$	58.82		2.7
303,105	$71.64	–	$96.03		91.96		3.9
631,242				$	74.73		3.3