Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

-Section 50

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

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

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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Note 15 - Share-based Payments (Details) - Summary of Exercise Prices, Weighted Average Remaining Contractual Life and Intrinsic Values of Outstanding Options (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number Outstanding (in Shares)	943,323	976,062	1,107,257	1,407,639
Weighted average exercise price per share ,options outstanding	$ 6.23	$ 5.41	$ 3.97	$ 3.80
Weighted average remaining contractual life (years), options outstanding	3 years 73 days
Aggregate intrinsic value, options outstanding (in Dollars)	$ 12,067,946
Number exercisable (in Shares)	653,145		753,506
Weighted average exercise price per share, options exercisable	$ 4.11		$ 3.15
Aggregate intrinsic value, options exercisable (in Dollars)	9,722,776
Exercise Price Range 01 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price - lower	$ 2.40
Exercise price - higher	$ 2.92
Number Outstanding (in Shares)	467,410
Weighted average exercise price per share ,options outstanding	$ 2.73
Weighted average remaining contractual life (years), options outstanding	1 year 328 days
Aggregate intrinsic value, options outstanding (in Dollars)	7,605,899
Number exercisable (in Shares)	443,444
Weighted average exercise price per share, options exercisable	$ 2.72
Aggregate intrinsic value, options exercisable (in Dollars)	7,220,526
Exercise Price Range 02 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price - lower	$ 3.00
Exercise price - higher	$ 5.76
Number Outstanding (in Shares)	213,312
Weighted average exercise price per share ,options outstanding	$ 5.09
Weighted average remaining contractual life (years), options outstanding	3 years 6 months
Aggregate intrinsic value, options outstanding (in Dollars)	2,967,841
Number exercisable (in Shares)	139,685
Weighted average exercise price per share, options exercisable	$ 4.85
Aggregate intrinsic value, options exercisable (in Dollars)	1,976,136
Exercise Price Range 03 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price - lower	$ 8.56
Exercise price - higher	$ 10.16
Number Outstanding (in Shares)	119,126
Weighted average exercise price per share ,options outstanding	$ 9.12
Weighted average remaining contractual life (years), options outstanding	5 years
Aggregate intrinsic value, options outstanding (in Dollars)	1,176,925
Number exercisable (in Shares)	43,141
Weighted average exercise price per share, options exercisable	$ 9.06
Aggregate intrinsic value, options exercisable (in Dollars)	428,645
Exercise Price Range 04 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price - lower	$ 14.67
Exercise price - higher	$ 19.41
Number Outstanding (in Shares)	143,475
Weighted average exercise price per share ,options outstanding	$ 16.92
Weighted average remaining contractual life (years), options outstanding	6 years
Aggregate intrinsic value, options outstanding (in Dollars)	317,281
Number exercisable (in Shares)	26,875
Weighted average exercise price per share, options exercisable	$ 15.37
Aggregate intrinsic value, options exercisable (in Dollars)	$ 97,469