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Note 10 - Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2024

Notes Tables

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

		2024				2023				2022
Expected option life in years(1)			6.0				6.0				6.0
Expected stock price volatility percentage(2)			27	%			28	%			26	%
Risk-free interest rate percentage(3)			4.3	%			4.1	%			2.9	%
Expected dividend yield(4)			1.38	%			1.14	%			1.13	%
Fair value as of the date of grant		$	5.26			$	6.63			$	5.79

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

		Shares				Weighted- Average Exercise Price
Outstanding at December 31, 2023			838,150			$	16.65
Granted			28,000				17.77
Exercised			(99,829	)			13.05
Forfeited			(61,900	)			17.26
Outstanding at December 31, 2024			704,421			$	17.17
Exercisable at December 31, 2024			441,921			$	16.23

Schedule of Nonvested Share Activity [Table Text Block]

		Shares				Weighted- Average Grant Date Fair Value				Weighted- Average Remaining Contractual Life (in Years)
Nonvested at December 31, 2023			406,300			$	4.88				5.0
Granted			28,000				5.26				6.6
Vested			(128,300	)			4.67				3.6
Forfeited			(43,500	)			4.57				4.2
Nonvested at December 31, 2024			262,500			$	5.07				4.4

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

		Shares				Weighted-Average Grant Date Fair Value
Nonvested at December 31, 2023			188,400			$	19.51
Granted			125,464				17.54
Vested			(49,162	)(1)			18.34
Forfeited			(9,148	)			20.26
Nonvested at December 31, 2024			255,554			$	18.77

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Tabular disclosure of the changes in outstanding nonvested restricted stock units.

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