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Note 15 - Share-based Payments (Tables)

3 Months Ended

Mar. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

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

		Three months ended March 31, 2015								Three months ended March 31, 2014
		Number of Shares				Weighted Average exercise price per share				Number of Shares				Weighted Average exercise price per share
Outstanding, beginning of period			976,062			$	5.41				1,407,639			$	3.80
Granted			45,000				19.41				—				—
Exercised			(74,997	)			3.31				(291,913	)			3.12
Forfeited			(2,742	)			12.15				(5,594	)			5.56
Expired			—				—				(2,875	)			3.40
Outstanding, end of period			943,323			$	6.23				1,107,257			$	3.97
Options exercisable, end of period			653,145			$	4.11				753,506			$	3.15

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

														Options outstanding																Options exercisable
		Exercise price												Outstanding Number				Weighted average exercise price per share				Weighted Average remaining contractual life (years)				Aggregate intrinsic value				Number exercisable				Weighted average exercise price per share				Aggregate intrinsic value
		$	2.40				-			$	2.92				467,410			$	2.73				1.9			$	7,605,899				443,444			$	2.72			$	7,220,526
		$	3.00				-			$	5.76				213,312			$	5.09				3.5				2,967,841				139,685			$	4.85				1,976,136
		$	8.56				-			$	10.16				119,126			$	9.12				5.0				1,176,925				43,141			$	9.06				428,645
		$	14.67				-			$	19.41				143,475			$	16.92				6.0				317,281				26,875			$	15.37				97,469
															943,323			$	6.23				3.2			$	12,067,946				653,145			$	4.11			$	9,722,776

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- 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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