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Note 5 - Income Taxes (Details) - Changes in the Valuation Allowance (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2013
Increase Due To Uncertainty Of Recovery [Member]
Dec. 31, 2012
Increase Due To Uncertainty Of Recovery [Member]
Dec. 31, 2011
Increase Due To Uncertainty Of Recovery [Member]
Dec. 31, 2013
Decrease Related To Utilization And Expiration [Member]
Dec. 31, 2012
Decrease Related To Utilization And Expiration [Member]
Dec. 31, 2013
Net Valuation Allowance Balance [Member]
Dec. 31, 2012
Net Valuation Allowance Balance [Member]
Dec. 31, 2011
Net Valuation Allowance Balance [Member]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]                        
Balance at beginning of year $ (27,155) $ (23,030) $ (22,895) $ (19,073)           $ (27,155) $ (23,030) $ (22,895)
Valuation Allowance Deferred Tax Asset Change In Amount         (3,870) (3,837) (3,822) (255) 3,702      
Balance at end of year (27,155) (23,030) (22,895) (19,073)           (27,155) (23,030) (22,895)
Valuation Allowance Deferred Tax Asset Change In Amount         $ (3,870) $ (3,837) $ (3,822) $ (255) $ 3,702