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.

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

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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
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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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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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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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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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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Note 12 - Stock Option Plans (Details) - Summary of Exercise Prices, Weighted Average Remaining Contractual Life and Intrinsic Values of Outstanding Options - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number outstanding (in Shares)	513,366	976,062	1,407,639	2,148,170
Weighted average exercise price per share, options outstanding	$ 9.24	$ 5.41	$ 3.80	$ 2.56
Weighted average remaining contractual life (years), options outstanding	3 years 219 days
Aggregate intrinsic value, options outstanding (in Dollars)	$ 6,175,024
Number exercisable (in Shares)	321,155	725,392	1,045,475
Weighted average exercise price per share, options exercisable	$ 6.49	$ 4.03	$ 3.14
Weighted average remaining contractual life (years), options exercisable	2 years 292 days
Aggregate intrinsic value, options exercisable (in Dollars)	$ 4,692,919
Exercise Price Range 01 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price - lower	$ 2.80
Exercise price - higher	$ 2.92
Number outstanding (in Shares)	118,490
Weighted average exercise price per share, options outstanding	$ 2.84
Weighted average remaining contractual life (years), options outstanding	1 year 292 days
Aggregate intrinsic value, options outstanding (in Dollars)	$ 2,163,787
Number exercisable (in Shares)	118,490
Weighted average exercise price per share, options exercisable	$ 2.84
Weighted average remaining contractual life (years), options exercisable	1 year 292 days
Aggregate intrinsic value, options exercisable (in Dollars)	$ 2,163,787
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)	148,348
Weighted average exercise price per share, options outstanding	$ 5.18
Weighted average remaining contractual life (years), options outstanding	2 years 292 days
Aggregate intrinsic value, options outstanding (in Dollars)	$ 2,361,720
Number exercisable (in Shares)	110,841
Weighted average exercise price per share, options exercisable	$ 5.08
Weighted average remaining contractual life (years), options exercisable	2 years 6 months
Aggregate intrinsic value, options exercisable (in Dollars)	$ 1,775,898
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)	92,253
Weighted average exercise price per share, options outstanding	$ 9.05
Weighted average remaining contractual life (years), options outstanding	4 years 73 days
Aggregate intrinsic value, options outstanding (in Dollars)	$ 1,111,453
Number exercisable (in Shares)	43,374
Weighted average exercise price per share, options exercisable	$ 8.92
Weighted average remaining contractual life (years), options exercisable	3 years 328 days
Aggregate intrinsic value, options exercisable (in Dollars)	$ 528,510
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	$ 24.96
Number outstanding (in Shares)	154,275
Weighted average exercise price per share, options outstanding	$ 18.18
Weighted average remaining contractual life (years), options outstanding	5 years 109 days
Aggregate intrinsic value, options outstanding (in Dollars)	$ 538,064
Number exercisable (in Shares)	48,450
Weighted average exercise price per share, options exercisable	$ 16.46
Weighted average remaining contractual life (years), options exercisable	4 years 292 days
Aggregate intrinsic value, options exercisable (in Dollars)	$ 224,724