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Note 7 - Stock Plans (Tables)

6 Months Ended

Jun. 30, 2023

Notes Tables

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

		June 30, 2023									June 30, 2022
							Weighted-									Weighted-
		Shares					average grant				Shares					average grant
		granted					date fair value				granted					date fair value
Director plan			-				$	-				18,000		(2)		$	49.85
Omnibus plan			18,000		(2)			49.43				16,520		(3)			49.85
Omnibus plan			17,684		(3)			49.43				50		(1)			35.91
Omnibus plan			50		(1)			49.43				-					-
Omnibus plan			1,000		(3)			44.06				-					-
Total			36,734				$	49.28				34,570				$	49.83

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, 2022			23,872				38,614				62,486			$	51.46
Granted			-				36,734				36,734				49.28
Forfeited			-				-				-				-
Vested			(11,353	)			(12,930	)			(24,283	)			52.57
Non-vested balance at June 30, 2023			12,519				62,418				74,937			$	50.04

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, 2022			87,133			$	9.69				4.5
Granted			-
Exercised			(7,665	)
Forfeited			-
Outstanding June 30, 2023			79,468			$	10.18				4.1

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

		Three months ended June 30,								Six months ended June 30,
(dollars in thousands)		2023				2022				2023				2022
Stock-based compensation expense:
2012 Director stock incentive plan		$	173			$	263			$	287			$	372
2012 Omnibus stock incentive plan			118				150				259				315
2022 Omnibus stock incentive plan			227				-				383				-
Employee stock purchase plan			-				-				34				32
Total stock-based compensation expense		$	518			$	413			$	963			$	719

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

		As of
(dollars in thousands)		June 30, 2023
Unrecognized stock-based compensation expense:
2012 Director stock incentive plan		$	486
2012 Omnibus stock incentive plan			552
2022 Omnibus stock incentive plan			1,428
Total unrecognized stock-based compensation expense		$	2,466

X

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

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