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
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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
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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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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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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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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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Note 17 - Stock-based Compensation (Details) - Stock Options Outstanding and Exercisable - $ / shares	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]
Stock options outstanding (in Shares)	298,740	759,683	503,834	722,155
Outstanding options, weighted-average exercise price	$ 9.97	$ 11.36	$ 10.41	$ 10.18
Outstanding options, weighted-average remaining contractual life	2 years 306 days
Stock options exercisable (in Shares)	225,580
Exercisable options, weighted-average exercise price	$ 9.99
Range 1 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding options, exercise price range, lower limit	5.76
Outstanding options, exercise price range, upper Limit	$ 9.21
Stock options outstanding (in Shares)	162,269
Outstanding options, weighted-average exercise price	$ 5.76
Outstanding options, weighted-average remaining contractual life	2 years 346 days
Exercisable options, exercise price range, lower limit	$ 5.76
Exercisable options, exercise price range, upper limit	$ 9.21
Stock options exercisable (in Shares)	105,359
Exercisable options, weighted-average exercise price	$ 5.76
Range 2 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding options, exercise price range, lower limit	9.22
Outstanding options, exercise price range, upper Limit	$ 15.47
Stock options outstanding (in Shares)	108,529
Outstanding options, weighted-average exercise price	$ 12.41
Outstanding options, weighted-average remaining contractual life	1 year 215 days
Exercisable options, exercise price range, lower limit	$ 9.22
Exercisable options, exercise price range, upper limit	$ 15.47
Stock options exercisable (in Shares)	101,859
Exercisable options, weighted-average exercise price	$ 12.51
Range 3 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding options, exercise price range, lower limit	15.48
Outstanding options, exercise price range, upper Limit	$ 22.66
Stock options outstanding (in Shares)	18,794
Outstanding options, weighted-average exercise price	$ 19.28
Outstanding options, weighted-average remaining contractual life	6 years 295 days
Exercisable options, exercise price range, lower limit	$ 15.48
Exercisable options, exercise price range, upper limit	$ 22.66
Stock options exercisable (in Shares)	15,714
Exercisable options, weighted-average exercise price	$ 19.45
Range 4 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding options, exercise price range, lower limit	22.67
Outstanding options, exercise price range, upper Limit	$ 49.50
Stock options outstanding (in Shares)	9,148
Outstanding options, weighted-average exercise price	$ 36.61
Outstanding options, weighted-average remaining contractual life	7 years 237 days
Exercisable options, exercise price range, lower limit	$ 22.67
Exercisable options, exercise price range, upper limit	$ 49.50
Stock options exercisable (in Shares)	2,648
Exercisable options, weighted-average exercise price	$ 24.59