Note 17 - Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Stock-based compensation expense

	2023		2022		2021
	(dollars in thousands)
Stock options	$	286	$	246	$	270
Restricted stock awards		2,084		1,967		1,864
Stock purchase plan		308		225		218
	$	2,678	$	2,438	$	2,352

Summary of the stock option plans

	December 31,
	2023				2022				2021
			Weighted				Weighted				Weighted
			Average				Average				Average
			Exercise				Exercise				Exercise
	Shares		Price		Shares		Price		Shares		Price
Outstanding, beginning		346,678	$	27.60		367,998	$	24.46		407,763	$	22.24
Granted		25,000		53.31		22,400		53.87		22,150		43.61
Exercised		(81,354)		19.45		(41,695)		14.07		(60,317)		15.76
Forfeited		(175)		15.65		(2,025)		26.72		(1,598)		38.50
Outstanding, ending		290,149		32.11		346,678		27.60		367,998		24.46
Exercisable, ending		233,967				295,077				318,266
Weighted average fair value per option granted	$	16.36			$	13.97			$	10.85

Summary of options outstanding

	Options Outstanding
		Weighted			Options Exercisable
		Average	Weighted			Weighted
		Remaining	Average			Average
Range of	Number	Contractual	Exercise		Number	Exercise
Exercise Prices	Outstanding	Life	Price		Exercisable	Price
$17.10 to $17.86	96,500	0.62	$	17.32	96,460	$	17.32
$21.71 to $22.64	52,716	2.08		22.64	52,716		22.64
$29.77 to $36.00	14,212	5.16		36.00	14,212		36.00
$40.00 to $41.95	20,049	6.06		40.10	15,515		40.13
$42.65 to $48.50	59,572	4.82		43.86	49,254		43.91
$53.31 to $56.26	47,100	8.70		53.57	5,850		53.87
	290,149				234,007

Summary of changes in nonvested restricted stock awards

	December 31,
	2023		2022		2021
Outstanding, beginning		84,115		97,107		102,489
Granted*		51,157		35,525		38,360
Released		(43,331)		(47,766)		(43,691)
Forfeited		(3,763)		(751)		(51)
Outstanding, ending		88,178		84,115		97,107
Weighted average fair value per share granted	$	51.64	$	54.20	$	45.18

*  At December 31, 2023, includes 4,500 shares of restricted stock, 80,820 restricted stock units.

At December 31, 2022, includes 8,527 shares of restricted stock and 64,494 restricted stock units.

At December 31, 2021, includes 12,412 shares of restricted stock and 25,948 restricted stock units.

Schedule of Stock purchase plan

	2023		2022		2021
Shares granted		36,964		28,421		28,396
Shares purchased		35,058		27,103		30,543
Weighted average fair value per share granted	$	8.35	$	7.88	$	7.67