Note 5 - Equity Incentive Plan (Tables)

3 Months Ended

Mar. 31, 2021

Notes Tables

Share-based Payment Arrangement, Option, Activity [Table Text Block]

	March 31, 2021				March 31, 2020
	Shares		Weighted Average Exercise Price		Shares		Weighted Average Exercise Price
Options and SARs outstanding at beginning of period		284,591	$	43.71		273,039	$	41.19
Granted		24,999		59.02		—		—
Exercised		28,801		40.02		7,654		33.82
Forfeited or expired		—		—		4,300		39.46
Outstanding at end of period		280,789	$	45.45		261,085	$	41.43
Options and SARs exercisable at March 31		141,993	$	41.00		142,692	$	40.40