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Note 14 - Share-based Payments (Tables)

9 Months Ended

Sep. 30, 2016

Notes Tables

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

		Three months ended								Three months ended
		September 30, 2016								September 30, 2015
		Number of shares				Weighted average exercise price per share				Number of shares				Weighted average exercise price per share
Outstanding, beginning of period			502,590			$	11.30				827,076			$	6.69
Granted			18,750				27.53				22,500				24.96
Exercised			(31,065	)			3.80				(41,404	)			4.59
Forfeited			-				-				(3,677	)			9.63
Expired			-				-				-				-
Outstanding, end of period			490,275				12.39				804,495				7.30
Options exercisable, end of period			306,553			$	9.16				580,721			$	4.85

		Nine months ended								Nine months ended
		September 30, 2016								September 30, 2016
		Number of shares				Weighted average exercise price per share				Number of shares				Weighted average exercise price per share
Outstanding, beginning of period			513,366			$	9.24				976,062			$	6.23
Granted			81,750				22.66				67,500				21.26
Exercised			(94,602	)			3.75				(229,057	)			3.22
Forfeited			(9,489	)			17.23				(8,135	)			11.43
Expired			(750	)			3.76				(1,875	)			2.40
Outstanding, end of period			490,275				12.39				804,495				7.30
Options exercisable, end of period			306,553			$	9.16				580,721			$	4.85

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
$ 2.80	-	$ 4.48			63,920			$	2.99				1.4			$	1,854,420				63,920			$	2.99				1.4			$	1,854,420
$ 5.52	-	$ 8.92			174,680				6.62				2.7				4,432,845				151,258				6.50				2.5				3,857,578
$ 10.16	-	$14.67			29,375				10.83				4.0				621,819				10,625				12.02				3.7				212,319
$ 15.51	-	$19.95			131,800				17.36				4.8				1,929,101				62,000				16.76				4.5				944,965
$ 21.10	-	$27.53			90,500				23.43				5.5				775,353				18,750				24.96				3.9				132,000
					490,275			$	12.39				3.7			$	9,613,538				306,553			$	9.16				2.8			$	7,001,282

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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
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