Note 10 - Common Stock Repurchases (Details) (USD $) In Millions, unless otherwise specified	Aug. 28, 2007 August 2007 Repurchase Plan [Member]	Jul. 09, 2013 July 2013 Repurchase Program [Member]
Note 10 - Common Stock Repurchases (Details) [Line Items]
Stock Repurchase Program, Authorized Amount	$ 100.0	$ 50.0