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Note 7 - 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]

		2025				2024
Expected life of stock options (in years)			4.7				6.2
Risk free interest rate			4.50	%			3.98	%
Annualized Volatility			34.8	%			32.3	%
Dividend yields			2.70	%			3.17	%
Weighted-average fair value of options granted during the nine months ended September 30, 2025 and 2024		$	17.90			$	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, 2024			165,517			$	21.52
Options exercised			(32,070	)			17.03
Options cancelled			(1,600	)			24.40
Options outstanding at December 31, 2024			131,847			$	22.58
Options cancelled			(800	)		$	24.40
Options exercised			(40,255	)			22.56
Options outstanding at September 30, 2025			90,792			$	22.57				1.4			$	1,867,655
Options exercisable at September 30, 2025			90,792			$	22.57				1.4			$	1,867,655

		Shares				Weighted Average Exercise Price				Weighted Average Remaining Contractual Term in Years				Intrinsic Value
Options outstanding at January 1, 2024			105,500			$	31.00
Options granted			107,200				34.07
Options cancelled			(1,200	)			34.07
Options exercised			(1,300	)			31.00
Options outstanding at December 31, 2024			210,200			$	32.55
Options granted			30,803				31.09
Options cancelled			(2,760	)			34.07
Options exercised			(3,600	)			31.51
Options outstanding at September 30, 2025			234,643			$	32.35				7.4			$	2,530,689
Options exercisable at September 30, 2025			113,443			$	31.57				7.0			$	1,312,289
Options expected to vest after September 30, 2025			107,662			$	33.09				7.8			$	1,082,305

Share-Based Payment Arrangement, Cost by Plan [Table Text Block]

		2025				2024
Fair value of options vested		$	191,000			$	192,000
Intrinsic value of options exercised		$	260,000			$	25,000
Cash received from option exercises		$	353,000			$	-
Tax benefit from option exercises		$	24,000			$	5,000
Compensation cost		$	93,000			$	131,000
Tax benefit associated with compensation cost		$	5,000			$	13,000

		2025				2024
Fair value of options vested		$	384,000			$	199,000
Intrinsic value of options exercised		$	874,000			$	561,000
Cash received from option exercises		$	936,000			$	367,000
Tax benefit from option exercises		$	43,000			$	74,000
Compensation cost		$	256,000			$	350,000
Tax benefit associated with compensation cost		$	14,000			$	33,000

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