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Note 10 - Dividends (Details) (USD $)	1 Months Ended		12 Months Ended
	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2012
Disclosure of Restrictions on Dividends, Loans and Advances Disclosure [Abstract]
Common Stock, Dividends, Per Share, Declared	$ 1.00us-gaap_CommonStockDividendsPerShareDeclared	$ 1.00us-gaap_CommonStockDividendsPerShareDeclared	$ 2.00us-gaap_CommonStockDividendsPerShareDeclared

X

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_DisclosureOfRestrictionsOnDividendsLoansAndAdvancesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration