Note 16 - Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Stock-based compensation expense

	2022		2021		2020
	(dollars in thousands)
Stock options	$	246	$	270	$	297
Restricted stock awards		1,967		1,864		1,619
Stock purchase plan		225		218		234
	$	2,438	$	2,352	$	2,150

Summary of the stock option plans

	December 31,
	2022				2021				2020
			Weighted				Weighted				Weighted
			Average				Average				Average
			Exercise				Exercise				Exercise
	Shares		Price		Shares		Price		Shares		Price
Outstanding, beginning		367,998	$	24.46		407,763	$	22.24		426,913	$	20.14
Granted		22,400		53.87		22,150		43.61		23,350		39.12
Exercised		(41,695)		14.07		(60,317)		15.76		(41,650)		10.67
Forfeited		(2,025)		26.72		(1,598)		38.50		(850)		19.94
Outstanding, ending		346,678		27.60		367,998		24.46		407,763		22.24
Exercisable, ending		295,077				318,266				354,899
Weighted average fair value per option granted	$	13.97			$	10.85			$	10.07

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
$15.50 to $15.65	57,616	0.25	$	15.64	57,616	$	15.64
$17.10 to $18.00	108,890	1.57		17.32	108,890		17.32
$22.64 to $22.64	53,316	3.08		22.64	53,316		22.64
$36.00 to $41.95	36,773	6.67		38.30	23,060		38.06
$42.65 to $48.50	67,908	5.63		43.76	51,995		43.80
$53.87 to $56.26	22,175	9.17		53.89	200		53.87
	346,678				295,077

Summary of changes in nonvested restricted stock awards

	December 31,
	2022		2021		2020
Outstanding, beginning		97,107		102,489		106,826
Granted*		35,525		38,360		34,559
Released		(47,766)		(43,691)		(37,296)
Forfeited		(751)		(51)		(1,600)
Outstanding, ending		84,115		97,107		102,489
Weighted average fair value per share granted	$	54.20	$	45.18	$	39.39

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

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

At December 31, 2020, includes 8,913 shares of restricted stock and 25,646 restricted stock units.

Schedule of Stock purchase plan

	2022		2021		2020
Shares granted		28,421		28,396		38,738
Shares purchased		27,103		30,543		37,114
Weighted average fair value per share granted	$	7.88	$	7.67	$	6.03