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Note 14 - Share-based Payments (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

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

		Three months ended June 30,								Three months ended June 30,
		2018								2017
		Number of shares				Weighted average exercise price per share				Number of shares				Weighted average exercise price per share
Outstanding, beginning of period			634,883			$	37.48				430,611			$	15.46
Granted			128,566				64.10				-				-
Exercised			(16,153	)			12.26				(66,746	)			8.26
Forfeited			(13,100	)			55.04				(257	)			11.43
Expired			-				-				-				-
Outstanding, end of period			734,196				42.39				363,608				16.79
Options exercisable, end of period			229,780			$	16.92				213,769			$	11.46

		Six months ended June 30,								Six months ended June 30,
		2018								2017
		Number of shares				Weighted average exercise price per share				Number of shares				Weighted average exercise price per share
Outstanding, beginning of period			653,571			$	36.69				474,501			$	12.67
Granted			139,566				63.66				32,875				40.56
Exercised			(28,716	)			10.30				(135,622	)			8.04
Forfeited			(30,225	)			47.96				(8,146	)			18.24
Expired			-				-				-				-
Outstanding, end of period			734,196				42.39				363,608				16.79
Options exercisable, end of period			229,780			$	16.92				213,769			$	11.46

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by 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
$ 2.92	-	$ 8.92			75,367			$	6.94				1.2			$	4,048				75,367			$	6.94				1.2			$	4,048
$10.16	-	$19.95			109,488				16.38				3.0				4,847				83,288				15.99				2.8				3,720
$21.10	-	$27.53			72,500				23.76				3.6				2,674				52,500				24.78				3.2				1,883
$35.25	-	$37.35			14,375				35.89				4.9				356				10,625				36.11				4.7				261
$43.15	-	$47.00			18,500				44.19				5.6				305				8,000				43.75				5.6				135
$53.20	-	$58.65			315,400				55.51				5.9				1,622				-				-				-				-
$64.10	-	$64.10			128,566				64.10				6.9				-				-				-				-				-
					734,196			$	42.39				4.9			$	13,852				229,780			$	16.92				2.6			$	10,047

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.

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- Definition

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