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Note 15 - Share-based Payments (Tables)

6 Months Ended

Jun. 30, 2022

Notes Tables

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

		Three Months Ended June 30, 2022								Three Months Ended June 30, 2021
		Number of shares				Weighted average exercise price per share				Number of shares				Weighted average exercise price per share
Outstanding, beginning of period			883,254			$	64.37				808,469			$	55.55
Granted			211,480				42.07				239,050				79.43
Exercised			(975	)			56.98				(45,538	)			43.24
Forfeited			(15,951	)			75.87				(9,498	)			61.23
Expired			(7,763	)			58.62				(1,386	)			61.93
Outstanding, end of period			1,070,045				59.88				991,097				61.81
Options exercisable, end of period			540,937			$	59.62				438,437			$	53.16

		Six Months Ended June 30, 2022								Six Months Ended June 30, 2021
		Number of shares				Weighted average exercise price per share				Number of shares				Weighted average exercise price per share
Outstanding, beginning of period			904,151			$	64.36				845,020			$	55.31
Granted			218,480				43.01				239,050				79.43
Exercised			(12,567	)			56.66				(73,875	)			44.82
Forfeited			(31,394	)			73.05				(17,562	)			61.00
Expired			(8,625	)			58.97				(1,536	)			61.93
Outstanding, end of period			1,070,045				59.88				991,097				61.81
Options exercisable, end of period			540,937			$	59.62				438,437			$	53.16

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

		Options outstanding																Options exercisable
Exercise price		Number outstanding				Weighted average exercise price per share				Weighted average remaining contractual life (years)				Aggregate intrinsic value				Number exercisable				Weighted average exercise price per share				Weighted average remaining contractual life (years)				Aggregate intrinsic value
$19.95 - $19.95			7,000			$	19.95				0.6			$	172				7,000			$	19.95				0.6			$	172
$21.10 - $21.10			20,892				21.10				0.5				489				20,892				21.10				0.5				489
$41.97 - $48.00			221,480				42.24				6.8				535				7,000				47.29				2.6				-
$51.82 - $59.98			214,121				55.59				2.1				-				205,921				55.60				2.0				-
$60.01 - $68.41			328,702				62.05				4.1				-				230,456				62.63				3.8				-
$70.13 - $79.51			261,350				78.43				5.7				-				65,918				78.11				5.8				-
$80.61 - $82.07			16,500				81.27				6.3				-				3,750				82.07				6.3				-
			1,070,045			$	59.88				4.6			$	1,196				540,937			$	56.40				3.2			$	661

X

- Definition

Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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- Definition

Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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-Name Accounting Standards Codification
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-Section 50
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