Note 11 - Options Outstanding (Details)	9 Months Ended
	Sep. 30, 2015 $ / shares shares
Exercise Price Range 1 [Member]
778,694 (in shares) | shares	44.8
56,592 (in dollars per share)	$ 61.25
56,592 (in dollars per share)
56,592 (in dollars per share)	$ 62.34
56,592	61 years 171 days
Exercise Price Range 2 [Member]
778,694 (in shares) | shares