Note 3 - Liabilities Subject To Compromise (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012
Bankruptcy Claims, Amount of Claims Settled	$ 650

Amount of bankruptcy claim settled.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 90-7

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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