Note 3 - Commitments and Contingencies (Details) (Former Chairman [Member], USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2013	Jun. 30, 2013
Former Chairman [Member]
Note 3 - Commitments and Contingencies (Details) [Line Items]
Retirement Pay and Benefits	$ 10.8	$ 10.8
Other Postretirement Benefits Payable	0.9	0.9
Other Postretirement Benefits Payable, Noncurrent	$ 2.7	$ 2.7

The total amount of the entity's noncurrent obligation as of the balance sheet date under any other retirement plan(s), such as one or more defined contribution plans.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant