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Note 14 - Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

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

										Weighted average
						Weighted				remaining
		Number of				average				contractual life				Aggregate
		options				exercise price				(years)				intrinsic value
Shares issuable under options - Beginning of period			2,337,573			$	120.06
Granted			615,000				142.20
Exercised			(455,934	)			73.73
Forfeited			(75,890	)			144.43
Shares issuable under options - December 31, 2023			2,420,749			$	133.65				2.5			$	68,849
Options exercisable - End of period			1,044,891			$	120.60				1.6			$	43,351

Stock Options Exercised [Table Text Block]

		2023
Number of options exercised			455,934
Aggregate fair value		$	66,499
Intrinsic value			32,883
Amount of cash received			33,616

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

		2023
Risk free rate			4.0	%
Expected life in years			4.20
Expected volatility			33.5	%
Dividend yield			0.6	%
Weighted average fair value per option granted		$	44.19

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