Note 10 - Fair Value Measurement (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2014	Dec. 31, 2013
Disclosure Text Block [Abstract]
Liabilities, Fair Value Disclosure, Recurring	$ 0	$ 2.8
Liabilities, Fair Value Adjustment	$ (2.8)

Amount of addition (reduction) to the amount at which a liability could be incurred (settled) in a current transaction between willing parties.

No definition available.

Name:	us-gaap_LiabilitiesFairValueAdjustment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration