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Note 12 - Share-Based Payments (Tables)

6 Months Ended

Jun. 30, 2013

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

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

		Three months ended								Three months ended
		June 30, 2013								June 30, 2012
						Weighted								Weighted
						Average								Average
		Number of				exercise price				Number of				exercise price
		Shares				per share				Shares				per share
Outstanding, beginning of period			8,672,016			$	0.65				8,458,699			$	0.57
Granted			331,500				2.14				504,000				1.38
Exercised			(519,716	)			0.54				(378,936	)			0.58
Forfeited			(15,315	)			1.32				(59,250	)			0.74
Expired			—				—				(14	)			0.49
Outstanding, end of period			8,468,485			$	0.71				8,524,499			$	0.62
Options exercisable, end of period			6,965,445			$	0.60				6,864,749			$	0.55

		Six months ended								Six months ended
		June 30, 2013								June 30, 2012
						Weighted								Weighted
						Average								Average
		Number of				exercise price				Number of				exercise price
		Shares				per share				Shares				per share
Outstanding, beginning of period			8,592,686			$	0.64				8,746,041			$	0.57
Granted			481,500				1.92				549,000				1.35
Exercised			(576,573	)			0.55				(673,153	)			0.52
Forfeited			(29,128	)			1.19				(97,375	)			0.78
Expired			—				—				(14	)			0.49
Outstanding, end of period			8,468,485			$	0.71				8,524,499			$	0.62
Options exercisable, end of period			6,965,445			$	0.60				6,864,749			$	0.55

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
	$	0.31	-				$			0.48				2,880,375			$	0.38				0.1			$	4,274,592				2,880,375			$	0.38			$	4,274,592
	$	0.56	-				$			0.94				4,357,860			$	0.69				2.5				5,079,745				3,723,820			$	0.69				4,353,687
	$	1.05	-				$			1.44				902,750			$	1.37				5.6				441,770				361,250			$	1.36				179,713
	$	2.14	-				$			2.14				327,500			$	2.14				6.9				—				—			$	—				—
														8,468,485			$	0.71				2.2			$	9,796,107				6,965,445			$	0.60			$	8,807,992

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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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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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