Note 13 - Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2025

Notes Tables

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

	September 30, 2025		December 31, 2024
Risk–free interest rate		4.13%		4.40%
Expected volatility		27.0%		24.1%
Expected life, in years		2.9		2.9
Expected dividend yield		2.80%		2.63%

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

	Number of Shares			Weighted Average Exercise Price		Aggregate Intrinsic Value
Options outstanding at January 1, 2024		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		–
Options granted		306,800			91.45		–
Options exercised		(142,364	)		65.99		–
Options cancelled		(6,333	)		78.77		–
Options outstanding at September 30, 2025		789,345		$	82.78	$	30,575,000
Options exercisable at September 30, 2025		265,750		$	73.96	$	12,636,000

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

Options Outstanding September 30, 2025	Exercise Prices				Weighted Average Exercise Price		Weighted Average Remaining Contractual Life in Years
236,279		$53.94	-	$71.64		$59.34		2.1
553,066		$90.62	-	$106.48		92.79		4.0
789,345						$82.78		3.4