Note 10 - Stock Repurchase Program (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended
Jul. 31, 2013	Mar. 31, 2014
Disclosure Text Block [Abstract]
Stock Repurchase Program, Authorized Amount	$ 100
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 68.0

Amount remaining of a stock repurchase plan authorized by an entity's Board of Directors.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration