Note 8 - Income Taxes (Details) - Unrecognized Tax Benefits Reconciliation (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Unrecognized Tax Benefits Reconciliation [Abstract]
Balance	$ 13,081	$ 12,204	$ 9,106
Gross increase for tax positions of prior year	646	188	1,710
Gross increase for tax position of current year	1,528	689	1,388
Reduction for prior year tax position	(333)
Balance	$ 14,922	$ 13,081	$ 12,204