Note 14 - Stock Comp Plan (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	3 years	3 years
Exercise Price Range 1 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price range, lower range limit		$ 6.80
Exercise price range, upper range limit		59.37
Exercise Price Range 2 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price range, lower range limit		59.38
Exercise price range, upper range limit		67.60
Exercise Price Range 3 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price range, lower range limit		67.61
Exercise price range, upper range limit		75.63
Exercise Price Range 4 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price range, lower range limit		75.64
Exercise price range, upper range limit		80.37
Exercise Price Range 5 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price range, lower range limit		80.38
Exercise price range, upper range limit		$ 98.49