Note 16 - Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Stock-based compensation expense

	2020		2019		2018
	(dollars in thousands)
Stock options	$	297	$	475	$	472
Restricted stock awards		1,619		1,850		857
Stock purchase plan		234		144		114
	$	2,150	$	2,469	$	1,443

Summary of the stock option plans

	December 31,
	2020				2019				2018
			Weighted				Weighted				Weighted
			Average				Average				Average
			Exercise				Exercise				Exercise
	Shares		Price		Shares		Price		Shares		Price
Outstanding, beginning		426,913	$	20.14		469,572	$	18.52		513,554	$	17.13
Granted		23,350		39.12		20,200		36.00		16,315		44.02
Exercised		(41,650)		10.67		(59,393)		12.11		(60,127)		13.56
Forfeited		(850)		19.94		(3,466)		31.59		(170)		16.81
Outstanding, ending		407,763		22.24		426,913		20.14		469,572		18.52
Exercisable, ending		354,899				365,084				358,270
Weighted average fair value per option granted	$	10.07			$	11.29			$	14.68

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
$7.99 to $8.93	11,325	0.14	$	8.15	11,325	$	8.15
$9.00 to $9.30	60,328	1.08		9.30	60,328		9.30
$15.50 to $15.65	66,491	2.24		15.64	66,491		15.64
$17.10 to $18.00	113,527	3.56		17.31	113,527		17.31
$21.71 to $22.64	58,115	5.22		22.88	56,115		22.63
$36.00 to $48.50	97,977	7.39		41.45	47,113		42.98
	407,763				354,899

Summary of changes in nonvested restricted stock awards

	December 31,
	2020		2019		2018
Outstanding, beginning		106,826		64,099		46,389
Granted*		34,559		85,961		37,315
Released		(37,296)		(37,624)		(19,605)
Forfeited		(1,600)		(5,610)		—
Outstanding, ending		102,489		106,826		64,099
Weighted average fair value per share granted	$	39.39	$	20.14	$	43.50

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

At December 31, 2019, includes 18,634 shares of restricted stock, 49,269 restricted stock units and 18,058 performance share units.

At December 31, 2018, includes 22,660 shares of restricted stock and 14,655 restricted stock units.

Schedule of Stock purchase plan

	2020		2019		2018
Shares granted		38,738		29,882		17,305
Shares purchased		37,114		28,775		15,528
Weighted average fair value per share granted	$	6.01	$	4.81	$	6.63