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Note 9 - Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

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

		Number of options and SAR units (1)				Weighted average exercise price				Weighted average remaining contractual term				Aggregate intrinsic-value
Outstanding at the beginning of the year			289,069			$	22.42				3.6			$	6,673
Granted			—				—
Exercised			(163,069	)			24.24
Forfeited or expired			—				—
Outstanding at the end of the year (2)			126,000			$	20.06				2.6			$	2,921
Exercisable at the end of the year (3)			126,000			$	20.06				2.6			$	2,921

Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block]

				Outstanding												Exercisable
Exercise price (range)				Number of options and SARs				Weighted average remaining contractual life (years)				Weighted average exercise price				Number of options and SARs				Weighted average remaining contractual life (years)				Weighted average exercise price
14.77	-	17.61			39,000				1.8			$	15.72				39,000				1.8			$	15.72
19.36	-	19.59			57,000				2.4			$	19.41				57,000				2.4			$	19.41
24.86	-	27.17			30,000				4.1			$	26.94				30,000				4.1			$	26.94
					126,000				2.6			$	20.06				126,000				2.6			$	20.06

Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]

		Number of RSUs and PSUs				Weighted average grant-date fair value
Unvested as at the beginning of the year			842,948			$	29.30
Granted			420,749				47.32
Vested			(484,775	)			26.80
Forfeited			(90,849	)			36.19
Unvested at the end of the year			688,073			$	41.18

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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