Note 16 - Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Stock-based compensation expense

	2019		2018		2017
	(dollars in thousands)
Stock options	$	475	$	472	$	554
Restricted stock awards		1,850		857		553
Stock purchase plan		144		114		80
	$	2,469	$	1,443	$	1,187

Summary of the stock option plans

	December 31,
	2019				2018				2017
			Weighted				Weighted				Weighted
			Average				Average				Average
			Exercise				Exercise				Exercise
	Shares		Price		Shares		Price		Shares		Price
Outstanding, beginning		469,572	$	18.52		513,554	$	17.13		587,961	$	14.83
Granted		20,200		36.00		16,315		44.02		43,250		43.86
Exercised		(59,393)		12.11		(60,127)		13.56		(114,100)		15.12
Forfeited		(3,466)		31.59		(170)		16.81		(3,557)		26.74
Outstanding, ending		426,913		20.14		469,572		18.52		513,554		17.13
Exercisable, ending		365,084				358,270				354,269
Weighted average fair value per option granted	$	11.29			$	14.68			$	14.75

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	18,405	1.11	$	8.10	18,405	$	8.10
$9.00 to $9.30	88,490	1.47		9.21	88,490		9.21
$15.50 to $15.65	67,541	3.24		15.64	66,741		15.64
$17.10 to $18.00	115,645	4.56		17.31	114,633		17.30
$21.71 to $22.64	59,905	6.08		22.63	46,309		22.63
$36.00 to $48.50	76,927	7.91		41.84	30,506		43.73
	426,913				365,084

Summary of changes in nonvested restricted stock awards

	December 31,
	2019		2018		2017
Outstanding, beginning		64,099		46,389		39,438
Granted*		85,961		37,315		28,289
Released		(37,624)		(19,605)		(21,338)
Forfeited		(5,610)		—		—
Outstanding, ending		106,826		64,099		46,389
Weighted average fair value per share granted	$	20.14	$	43.50	$	44.44

Schedule of Stock purchase plan

	2019		2018		2017
Shares granted		29,882		17,305		12,414
Shares purchased		28,775		15,528		13,318
Weighted average fair value per share granted	$	4.81	$	6.63	$	6.42