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Note 15 - Share-based Payments (Tables)

3 Months Ended

Mar. 31, 2016

Notes Tables

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

		Three months ended March 31,								Three months ended March 31,
		2016								2015
		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			$	5.41
Granted			55,000				20.89				45,000				19.41
Exercised			(11,574	)			4.63				(74,997	)			3.31
Forfeited			(5,401	)			12.24				(2,742	)			12.15
Expired			(750	)			3.76				-				-
Outstanding, end of period			550,641				10.48				943,323				6.23
Options exercisable, end of period			311,594			$	6.54				653,145			$	4.11

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				134,454			$	2.92				1.4			$	2,625,473				134,454			$	2.92				1.4			$	2,625,473
$	5.52	-	$8.92				185,787				6.63				3.2				2,938,836				123,465				6.48				2.9				1,971,487
$	10.16	-	$14.67				29,375				10.83				4.5				341,288				10,625				12.02				4.2				110,850
$	15.51	-	$19.95				133,525				17.34				5.3				681,658				43,050				16.66				4.6				249,411
$	21.10	-	$24.96				67,500				22.39				6.0				60,750				-				-				-				-
							550,641			$	10.48				3.7			$	6,648,005				311,594			$	6.54				2.5			$	4,957,221

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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- Definition

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)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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