Note 10 - Stock Plans (Tables)

12 Months Ended

Dec. 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]

	2024					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		1,000	(3)		44.06
Total		22,479		$	46.96		36,734		$	49.28

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		-			(1,020	)		(1,020	)		50.06
Vested		(11,353	)		(13,128	)		(24,481	)		52.57
Non-vested balance at December 31, 2023		12,519			61,200			73,719		$	50.03
Granted		-			22,479			22,479			46.96
Forfeited		-			(1,705	)		(1,705	)		48.45
Vested		(7,719	)		(18,149	)		(25,868	)		51.03
Non-vested balance at December 31, 2024		4,800			63,825			68,625		$	48.68

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		(22,807	)		4.34
Forfeited		-			-
Outstanding December 31, 2023		64,326		$	11.59		3.8
Granted		-			-
Exercised		-			-
Forfeited		-			-
Outstanding December 31, 2024		64,326		$	11.59		2.8

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

(dollars in thousands)	2024		2023
Stock-based compensation expense:
2012 Director stock incentive plan	$	259	$	484
2012 Omnibus stock incentive plan		263		479
2022 Omnibus stock incentive plan		803		651
Employee stock purchase plan		126		34
Total stock-based compensation expense	$	1,451	$	1,648

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

	As of
(dollars in thousands)	December 31, 2024
Unrecognized stock-based compensation expense:
2012 Director stock incentive plan	$	30
2012 Omnibus stock incentive plan		30
2022 Omnibus stock incentive plan		1,318
Total unrecognized stock-based compensation expense	$	1,378