Note 8 - Income Taxes (Details) (USD $)	3 Months Ended			3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Mar. 31, 2014 Scenario, Forecast [Member]	Apr. 30, 2011 Minimum [Member]
Note 8 - Income Taxes (Details) [Line Items]
Income Tax Expense (Benefit)	$ 257,000	$ (204,000)
Effective Income Tax Rate Reconciliation, Percent	2.80%	(8.90%)
Unrecognized Tax Benefits	15,200,000		14,900,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	5,200,000		5,000,000
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations				1,200,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	800,000		800,000
Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority					$ 10,500,000