Note 19 - Income Taxes - Reconciliation of Beginning and Ending Amounts of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Balance at beginning of year	$ 10,385	$ 7,511	$ 4,950
Additions based on tax positions taken in prior years	675	(198)	230
Additions based on tax positions taken in the current year	1,059	4,386	2,980
Reduction based on tax positions taken in prior years	(6,381)	(1,314)	(649)
Balance at end of year	$ 5,738	$ 10,385	$ 7,511