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Note 7 - Stock Plans (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block]

		March 31, 2024								March 31, 2023
						Weighted-								Weighted-
		Shares				average grant				Shares				average grant
		granted				date fair value				granted				date fair value
Omnibus plan			10,000	(2)		$	46.96				18,000	(2)		$	49.43
Omnibus plan			1,558	(2)			46.96				17,684	(3)			49.43
Omnibus plan			10,871	(3)			46.96				50	(1)			49.43
Omnibus plan			50	(1)			46.96				-				-
Total			22,479			$	46.96				35,734			$	49.43

Nonvested Restricted Stock Shares Activity [Table Text Block]

		2012 & 2022 Stock incentive plans
		Director				Omnibus				Total				Weighted- average grant date fair value
Non-vested balance at December 31, 2023			12,519				61,200				73,719			$	50.03
Granted			-				22,479				22,479				46.96
Forfeited			-				(372	)			(372	)			49.48
Vested			(7,719	)			(17,585	)			(25,304	)			51.05
Non-vested balance at March 31, 2024			4,800				65,722				70,522			$	48.69

Share-Based Payment Arrangement, Stock Appreciation Right, Activity [Table Text Block]

		Awards				Weighted-average grant date fair value				Weighted-average remaining contractual term (years)
Outstanding December 31, 2023			64,326			$	11.59				3.8
Granted			-
Exercised			-
Forfeited			-
Outstanding March 31, 2024			64,326			$	11.59				3.6

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

		Three months ended March 31,
(dollars in thousands)		2024				2023
Stock-based compensation expense:
2012 Director stock incentive plan		$	79			$	114
2012 Omnibus stock incentive plan			88				141
2022 Omnibus stock incentive plan			166				156
Employee stock purchase plan			126				34
Total stock-based compensation expense		$	459			$	445

Share-Based Payment Arrangement, Nonvested Award, Cost [Table Text Block]

		As of
(dollars in thousands)		March 31, 2024
Unrecognized stock-based compensation expense:
2012 Director stock incentive plan		$	210
2012 Omnibus stock incentive plan			216
2022 Omnibus stock incentive plan			2,008
Total unrecognized stock-based compensation expense		$	2,434

X

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

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