Note 16 - Supplemental Cash Flow Information (Details)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Note 16 - Supplemental Cash Flow Information (Details) [Line Items]
Stock Repurchased During Period, Shares	20,560
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	360,318	412,882
Employee Stock Option [Member]
Note 16 - Supplemental Cash Flow Information (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	40,816

Number of share options (or share units) exercised during the current period.

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

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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