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.

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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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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 12 - 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, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number Outstanding (in Shares)	1,107,257	1,407,639	2,168,003	2,148,170
Weighted average exercise price per share ,options outstanding	$ 3.97	$ 3.80	$ 2.60	$ 2.56
Weighted average remaining contractual life (years), options outstanding	2 years 146 days
Aggregate intrinsic value, options outstanding (in Dollars)	$ 11,111,128
Number exercisable (in Shares)	753,506		1,761,150
Weighted average exercise price per share, options exercisable	$ 3.15		$ 2.28
Aggregate intrinsic value, options exercisable (in Dollars)	8,178,768
Exercise Price $0.38 - $0.60 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price - lower	$ 1.52
Exercise price - higher	$ 2.40
Number Outstanding (in Shares)	255,704
Weighted average exercise price per share ,options outstanding	$ 2.33
Aggregate intrinsic value, options outstanding (in Dollars)	2,984,513
Number exercisable (in Shares)	255,704
Weighted average exercise price per share, options exercisable	$ 2.33
Aggregate intrinsic value, options exercisable (in Dollars)	2,984,513
Exercise Price $0.62 - $0.70 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price - lower	$ 2.48
Exercise price - higher	$ 2.80
Number Outstanding (in Shares)	356,824
Weighted average exercise price per share ,options outstanding	$ 2.76
Weighted average remaining contractual life (years), options outstanding	2 years
Aggregate intrinsic value, options outstanding (in Dollars)	4,010,829
Number exercisable (in Shares)	281,726
Weighted average exercise price per share, options exercisable	$ 2.75
Aggregate intrinsic value, options exercisable (in Dollars)	3,169,731
Exercise Price $0.73 - $0.94 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price - lower	$ 2.92
Exercise price - higher	$ 3.76
Number Outstanding (in Shares)	155,919
Weighted average exercise price per share ,options outstanding	$ 3.02
Weighted average remaining contractual life (years), options outstanding	2 years 292 days
Aggregate intrinsic value, options outstanding (in Dollars)	1,712,347
Number exercisable (in Shares)	106,215
Weighted average exercise price per share, options exercisable	$ 3.06
Aggregate intrinsic value, options exercisable (in Dollars)	1,161,627
Exercise Price $1.05 - $2.23 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price - lower	$ 4.20
Exercise price - higher	$ 10.16
Number Outstanding (in Shares)	338,810
Weighted average exercise price per share ,options outstanding	$ 6.91
Weighted average remaining contractual life (years), options outstanding	4 years 219 days
Aggregate intrinsic value, options outstanding (in Dollars)	2,403,439
Number exercisable (in Shares)	109,861
Weighted average exercise price per share, options exercisable	$ 6.15
Aggregate intrinsic value, options exercisable (in Dollars)	$ 862,897