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Note 3 - Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

Share-based Compensation, Stock Options, Activity [Table Text Block]

						Weighted-
						average
		Shares				Exercise Price
		2018				Per Share
Outstanding, January 1			19,750			$	20.94
Exercised			(6,000	)			23.00
Outstanding, June 30			13,750			$	20.05
Exercisable, June 30			13,750			$	20.05

Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]

						Weighted-
						average
						Grant Date Fair
		Shares				Value Per Share
Nonvested at January 1, 2018			14,601			$	35.14
Granted			9,952				48.20
Forfeited			(223	)			35.31
Vested			(3,905	)			33.61
Nonvested at June 30, 2018			20,425			$	41.80
Expected to vest at June 30, 2018			10,473			$	35.71

X

- Definition

Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

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