Note 8 - Income Taxes (Detail) - Unrecognized Tax Benefits Reconciliation (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2008
Balance at December 31, 20	$ 12,204	$ 9,106		$ 9,006
Gross increase for tax positions of prior year	188	1,710	0
Gross increases for tax position of current year	689	1,388	983
Reductions for prior year tax positions	0	0	0
Settlement	0	0	(883)
Reduction due to statutes expiring	0	0	0
Balance at December 31, 20	$ 13,081	$ 12,204	$ 9,106	$ 9,006